diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6f0d4975b..a26252606 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,8 @@
+# ALEX 1.5.1
+
+This release only contains some bug fixes.
+
+
 # ALEX 1.5.0
 
 ## Breaking Changes
diff --git a/README.md b/README.md
index 82d5a0541..03a9e117b 100644
--- a/README.md
+++ b/README.md
@@ -18,7 +18,7 @@ Make sure you have Java 8 installed on your system.
 We advise to use a modern web browser like Google Chrome, Mozilla Firefox or Microsoft Edge with JavaScript enabled.
 
 1. [Download](https://github.com/LearnLib/alex/releases/latest) the latest version.
-2. Open a terminal and start ALEX via `java -jar alex-1.5.0.war [--alex.port=XXXX]`.
+2. Open a terminal and start ALEX via `java -jar alex-1.5.1.war [--alex.port=XXXX]`.
 3. Wait until the command line prints something like `de.learnlib.alex.App - Started App in XX.XXX seconds`.
 3. Open *http://localhost:8000* in a web browser.
 
@@ -48,7 +48,7 @@ cd alex
 mvn install package [-DskipTests]
 ```
 
-The bundle can then be found at `build/target/alex-build-1.5.0.war`.
+The bundle can then be found at `build/target/alex-build-1.5.1.war`.
 
 ## Further reading
 
diff --git a/backend/pom.xml b/backend/pom.xml
index cdbb80a2c..b27b25a7e 100644
--- a/backend/pom.xml
+++ b/backend/pom.xml
@@ -23,7 +23,7 @@
     <parent>
         <groupId>de.learnlib.alex</groupId>
         <artifactId>alex-parent</artifactId>
-        <version>1.5.0</version>
+        <version>1.5.1</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
 
diff --git a/backend/src/main/java/de/learnlib/alex/data/dao/ProjectDAOImpl.java b/backend/src/main/java/de/learnlib/alex/data/dao/ProjectDAOImpl.java
index 954a113c7..abf53b263 100644
--- a/backend/src/main/java/de/learnlib/alex/data/dao/ProjectDAOImpl.java
+++ b/backend/src/main/java/de/learnlib/alex/data/dao/ProjectDAOImpl.java
@@ -26,6 +26,7 @@
 import de.learnlib.alex.learning.entities.LearnerResult;
 import de.learnlib.alex.learning.repositories.LearnerResultRepository;
 import de.learnlib.alex.testing.entities.TestSuite;
+import de.learnlib.alex.testing.repositories.TestReportRepository;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 import org.apache.logging.log4j.Marker;
@@ -68,6 +69,9 @@ public class ProjectDAOImpl implements ProjectDAO {
     /** The repository for learner results. */
     private LearnerResultRepository learnerResultRepository;
 
+    /** The repository for test reports. */
+    private TestReportRepository testReportRepository;
+
     /** The FileDAO to use. Will be injected. */
     private FileDAO fileDAO;
 
@@ -85,14 +89,17 @@ public class ProjectDAOImpl implements ProjectDAO {
      *         The FileDAO to use.
      * @param projectUrlDAO
      *         The ProjectUrlDAO to use.
+     * @param testReportRepository
+     *         The repository for test reports.
      */
     @Inject
     public ProjectDAOImpl(ProjectRepository projectRepository, LearnerResultRepository learnerResultRepository,
-            @Lazy FileDAO fileDAO, @Lazy ProjectUrlDAO projectUrlDAO) {
+            TestReportRepository testReportRepository, @Lazy FileDAO fileDAO, @Lazy ProjectUrlDAO projectUrlDAO) {
         this.projectRepository = projectRepository;
         this.learnerResultRepository = learnerResultRepository;
         this.fileDAO = fileDAO;
         this.projectUrlDAO = projectUrlDAO;
+        this.testReportRepository = testReportRepository;
     }
 
     @Override
@@ -111,6 +118,10 @@ public Project create(final Project project) throws ValidationException {
             testSuite.setProject(project);
             project.getTests().add(testSuite);
 
+            if (project.getUrls().isEmpty()) {
+                throw new ValidationException("The project has to have at least one URL.");
+            }
+
             project.getUrls().forEach(url -> {
                 url.setId(null);
                 url.setProject(project);
@@ -164,6 +175,10 @@ public Project update(User user, Project project) throws NotFoundException, Vali
                 .collect(Collectors.toList());
         projectUrlDAO.checkAccess(user, project, urls);
 
+        if (project.getUrls().isEmpty()) {
+            throw new ValidationException("The project has to have at least one URL.");
+        }
+
         try {
             project.setUser(user);
             project.setGroups(projectInDb.getGroups());
@@ -204,6 +219,8 @@ public void delete(User user, Long projectId) throws NotFoundException {
         final Project project = projectRepository.findOne(projectId);
         checkAccess(user, project);
 
+        testReportRepository.deleteAllByProject_Id(projectId);
+        learnerResultRepository.deleteAllByProject_Id(projectId);
         projectRepository.delete(project);
 
         // delete the project directory
diff --git a/backend/src/main/java/de/learnlib/alex/learning/repositories/LearnerResultRepository.java b/backend/src/main/java/de/learnlib/alex/learning/repositories/LearnerResultRepository.java
index 0041bde2d..f8f244d1e 100644
--- a/backend/src/main/java/de/learnlib/alex/learning/repositories/LearnerResultRepository.java
+++ b/backend/src/main/java/de/learnlib/alex/learning/repositories/LearnerResultRepository.java
@@ -116,4 +116,15 @@ public interface LearnerResultRepository extends JpaRepository<LearnerResult, UU
     @SuppressWarnings("checkstyle:methodname")
     Long deleteByProject_IdAndTestNoIn(Long projectId, Long... testNos);
 
+    /**
+     * Delete all learner results in a project.
+     *
+     * @param projectId
+     *         The ID of the project.
+     * @return The amount of deleted LearnResults.
+     */
+    @Transactional
+    @SuppressWarnings("checkstyle:methodname")
+    Long deleteAllByProject_Id(Long projectId);
+
 }
diff --git a/backend/src/main/java/de/learnlib/alex/learning/rest/LearnerResource.java b/backend/src/main/java/de/learnlib/alex/learning/rest/LearnerResource.java
index ff6cb92c9..b95ed6552 100644
--- a/backend/src/main/java/de/learnlib/alex/learning/rest/LearnerResource.java
+++ b/backend/src/main/java/de/learnlib/alex/learning/rest/LearnerResource.java
@@ -269,7 +269,7 @@ public Response resume(@PathParam("project_id") long projectId,
      * This will always return OK, even if there is nothing to stop.
      * To see if there is currently a learning process, the status like '/active' will be returned.
      *
-     * @param projectId     The project to stop.
+     * @param projectId The project to stop.
      * @return The status of the current learn process.
      * @successResponse 200 OK
      * @responseType de.learnlib.alex.learning.entities.LearnerStatus
@@ -281,8 +281,14 @@ public Response stop(@PathParam("project_id") long projectId) {
         User user = ((UserPrincipal) securityContext.getUserPrincipal()).getUser();
         LOGGER.traceEntry("stop() for user {}.", user);
 
+        try {
+            projectDAO.getByID(user.getId(), projectId);
+        } catch (NotFoundException e) {
+            return ResourceErrorHandler.createRESTErrorMessage("LearnerResource.stop", Status.NOT_FOUND, e);
+        }
+
         if (learner.isActive(projectId)) {
-            learner.stop(user); // Hammer Time
+            learner.stop(projectId); // Hammer Time
         } else {
             LOGGER.info(RESOURCE_MARKER, "tried to stop the learning again.");
         }
@@ -297,7 +303,6 @@ public Response stop(@PathParam("project_id") long projectId) {
      *
      * @param projectId The project to get the Status of.
      * @return The information of the learning
-     * @throws NotFoundException If the previous learn job or the related Project could not be found.
      * @successResponse 200 OK
      * @responseType de.learnlib.alex.learning.entities.LearnerResult
      * @errorResponse 404 not found `de.learnlib.alex.common.utils.ResourceErrorHandler.RESTError
@@ -305,9 +310,9 @@ public Response stop(@PathParam("project_id") long projectId) {
     @GET
     @Path("/{project_id}/status")
     @Produces(MediaType.APPLICATION_JSON)
-    public Response getResult(@PathParam("project_id") long projectId) throws NotFoundException {
+    public Response getStatus(@PathParam("project_id") long projectId) {
         User user = ((UserPrincipal) securityContext.getUserPrincipal()).getUser();
-        LOGGER.traceEntry("getResult() for user {}.", user);
+        LOGGER.traceEntry("getStatus() for user {}.", user);
 
         LearnerStatus status = learner.getStatus(projectId);
 
diff --git a/backend/src/main/java/de/learnlib/alex/learning/services/Learner.java b/backend/src/main/java/de/learnlib/alex/learning/services/Learner.java
index 0f6575e11..7b23b9a34 100644
--- a/backend/src/main/java/de/learnlib/alex/learning/services/Learner.java
+++ b/backend/src/main/java/de/learnlib/alex/learning/services/Learner.java
@@ -331,10 +331,11 @@ private void validateCounterexample(User user, LearnerResumeConfiguration config
     /**
      * Ends the learning process after the current step.
      *
-     * @param user The user that wants to stop his active thread.
+     * @param projectId The id of the project that is learned.
      */
-    public void stop(User user) {
-        final AbstractLearnerThread learnerThread = userThreads.get(user);
+    public void stop(Long projectId) {
+        final AbstractLearnerThread learnerThread = userThreads.get(projectId);
+
         if (learnerThread != null) {
             learnerThread.stopLearning();
         }
diff --git a/backend/src/main/java/de/learnlib/alex/testing/repositories/TestReportRepository.java b/backend/src/main/java/de/learnlib/alex/testing/repositories/TestReportRepository.java
index 742a92267..b303644a1 100644
--- a/backend/src/main/java/de/learnlib/alex/testing/repositories/TestReportRepository.java
+++ b/backend/src/main/java/de/learnlib/alex/testing/repositories/TestReportRepository.java
@@ -48,4 +48,15 @@ public interface TestReportRepository extends JpaRepository<TestReport, Long> {
     @Transactional(readOnly = true)
     @SuppressWarnings("checkstyle:methodname")
     List<TestReport> findAllByProject_Id(Long projectId);
+
+    /**
+     * Delete all test reports by project id.
+     *
+     * @param projectId
+     *         The id of the project.
+     * @return The number of deleted test reports.
+     */
+    @Transactional
+    @SuppressWarnings("checkstyle:methodname")
+    Long deleteAllByProject_Id(Long projectId);
 }
diff --git a/backend/src/test/java/de/learnlib/alex/data/dao/ProjectDAOImplTest.java b/backend/src/test/java/de/learnlib/alex/data/dao/ProjectDAOImplTest.java
index d80d8ff08..208f30a75 100644
--- a/backend/src/test/java/de/learnlib/alex/data/dao/ProjectDAOImplTest.java
+++ b/backend/src/test/java/de/learnlib/alex/data/dao/ProjectDAOImplTest.java
@@ -23,6 +23,7 @@
 import de.learnlib.alex.data.entities.SymbolGroup;
 import de.learnlib.alex.data.repositories.ProjectRepository;
 import de.learnlib.alex.learning.repositories.LearnerResultRepository;
+import de.learnlib.alex.testing.repositories.TestReportRepository;
 import org.hamcrest.MatcherAssert;
 import org.junit.Before;
 import org.junit.Test;
@@ -35,6 +36,7 @@
 import javax.persistence.RollbackException;
 import javax.validation.ConstraintViolationException;
 import javax.validation.ValidationException;
+import java.util.Collections;
 import java.util.HashSet;
 import java.util.LinkedList;
 import java.util.List;
@@ -65,11 +67,15 @@ public class ProjectDAOImplTest {
     @Mock
     private ProjectUrlDAO projectUrlDAO;
 
+    @Mock
+    private TestReportRepository testReportRepository;
+
     private ProjectDAO projectDAO;
 
     @Before
     public void setUp() {
-        projectDAO = new ProjectDAOImpl(projectRepository, learnerResultRepository, fileDAO, projectUrlDAO);
+        projectDAO = new ProjectDAOImpl(projectRepository, learnerResultRepository, testReportRepository, fileDAO,
+                projectUrlDAO);
     }
 
     @Test
@@ -91,6 +97,30 @@ public void shouldCreateAValidEmptyProject() {
         assertThat(p.getId(), is(equalTo(1L)));
     }
 
+    @Test(expected = ValidationException.class)
+    public void shouldNotCreateAProjectIfUrlsAreEmpty() throws NotFoundException {
+        User user = new User(USER_ID);
+
+        Project project = new Project();
+        project.setId(PROJECT_ID);
+        project.setUser(user);
+
+        projectDAO.create(project);
+    }
+
+    @Test(expected = ValidationException.class)
+    public void shouldNotUpdateAProjectIfUrlsAreEmpty() throws NotFoundException {
+        User user = new User(USER_ID);
+
+        Project project = new Project();
+        project.setId(PROJECT_ID);
+        project.setUser(user);
+
+        given(projectRepository.findOne(PROJECT_ID)).willReturn(project);
+
+        projectDAO.update(user, project);
+    }
+
     @Test
     public void shouldCreateAValidPreFilledProject() {
         SymbolGroup testGroup = new SymbolGroup();
@@ -111,6 +141,7 @@ public void shouldCreateAValidPreFilledProject() {
     @Test(expected = ValidationException.class)
     public void shouldHandleConstraintViolationExceptionOnProjectCreationGracefully() {
         Project project = new Project();
+        project.setUrls(Collections.singletonList(new ProjectUrl()));
         //
         given(projectRepository.save(project)).willThrow(ConstraintViolationException.class);
 
@@ -120,6 +151,7 @@ public void shouldHandleConstraintViolationExceptionOnProjectCreationGracefully(
     @Test(expected = ValidationException.class)
     public void shouldHandleDataIntegrityViolationExceptionOnProjectCreationGracefully() {
         Project project = new Project();
+        project.setUrls(Collections.singletonList(new ProjectUrl()));
         //
         given(projectRepository.save(project)).willThrow(DataIntegrityViolationException.class);
 
@@ -129,6 +161,7 @@ public void shouldHandleDataIntegrityViolationExceptionOnProjectCreationGraceful
     @Test(expected = ValidationException.class)
     public void shouldHandleTransactionSystemExceptionOnProjectCreationGracefully() {
         Project project = new Project();
+        project.setUrls(Collections.singletonList(new ProjectUrl()));
         //
         ConstraintViolationException constraintViolationException;
         constraintViolationException = new ConstraintViolationException("Project is not valid!", new HashSet<>());
@@ -218,6 +251,7 @@ public void shouldHandleConstraintViolationExceptionOnProjectUpdateGracefully()
         user.setId(USER_ID);
 
         Project project = new Project();
+        project.setUrls(Collections.singletonList(new ProjectUrl()));
         project.setUser(user);
         project.setId(PROJECT_ID);
 
@@ -235,6 +269,7 @@ public void shouldHandleDataIntegrityViolationExceptionOnProjectUpdateGracefully
         Project project = new Project();
         project.setUser(user);
         project.setId(PROJECT_ID);
+        project.setUrls(Collections.singletonList(new ProjectUrl()));
 
         given(projectRepository.save(project)).willThrow(DataIntegrityViolationException.class);
         given(projectRepository.findOne(PROJECT_ID)).willReturn(project);
@@ -248,6 +283,7 @@ public void shouldHandleTransactionSystemExceptionOnProjectUpdateGracefully() th
         user.setId(USER_ID);
 
         Project project = new Project();
+        project.setUrls(Collections.singletonList(new ProjectUrl()));
         project.setUser(user);
         project.setId(PROJECT_ID);
 
diff --git a/backend/src/test/java/de/learnlib/alex/learning/rest/LearnerResourceTest.java b/backend/src/test/java/de/learnlib/alex/learning/rest/LearnerResourceTest.java
index 1f3654eb8..68a65b1f6 100644
--- a/backend/src/test/java/de/learnlib/alex/learning/rest/LearnerResourceTest.java
+++ b/backend/src/test/java/de/learnlib/alex/learning/rest/LearnerResourceTest.java
@@ -297,7 +297,7 @@ public void shouldStopIfTheLearningIsActive() {
         Response response = target("/learner/" + PROJECT_TEST_ID + "/stop").request().header("Authorization", adminToken).get();
 
         assertEquals(Response.Status.OK.getStatusCode(), response.getStatus());
-        verify(learner).stop(admin);
+        verify(learner).stop(PROJECT_TEST_ID);
     }
 
     @Test
@@ -312,7 +312,7 @@ public void shouldNotStopIfTheLearningIsNotActive() {
         assertEquals(Response.Status.OK.getStatusCode(), response.getStatus());
         String expectedJSON = "{\"active\":false}";
         assertEquals(expectedJSON, response.readEntity(String.class));
-        verify(learner, never()).stop(admin);
+        verify(learner, never()).stop(PROJECT_TEST_ID);
     }
 
     @Test
diff --git a/backend/src/test/java/de/learnlib/alex/learning/services/LearnerTest.java b/backend/src/test/java/de/learnlib/alex/learning/services/LearnerTest.java
index 35fef0556..eedf8f972 100644
--- a/backend/src/test/java/de/learnlib/alex/learning/services/LearnerTest.java
+++ b/backend/src/test/java/de/learnlib/alex/learning/services/LearnerTest.java
@@ -118,7 +118,7 @@ public void shouldResumeAThread() throws NotFoundException {
 
     @Test
     public void shouldStopAThread() throws NotFoundException {
-        learner.stop(user);
+        learner.stop(-1L);
     }
 
     @Test
diff --git a/build/pom.xml b/build/pom.xml
index da677bbb3..c91427fea 100644
--- a/build/pom.xml
+++ b/build/pom.xml
@@ -23,7 +23,7 @@
     <parent>
         <artifactId>alex-parent</artifactId>
         <groupId>de.learnlib.alex</groupId>
-        <version>1.5.0</version>
+        <version>1.5.1</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
 
diff --git a/frontend/pom.xml b/frontend/pom.xml
index a9dcb2cfa..a48705a92 100644
--- a/frontend/pom.xml
+++ b/frontend/pom.xml
@@ -24,7 +24,7 @@
     <parent>
         <artifactId>alex-parent</artifactId>
         <groupId>de.learnlib.alex</groupId>
-        <version>1.5.0</version>
+        <version>1.5.1</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
 
diff --git a/frontend/src/main/javascript/environments.js b/frontend/src/main/javascript/environments.js
index f36ff3181..eb97476a8 100644
--- a/frontend/src/main/javascript/environments.js
+++ b/frontend/src/main/javascript/environments.js
@@ -18,7 +18,7 @@
  * The version of ALEX.
  * @type {string}
  */
-export const version = '1.5.0';
+export const version = '1.5.1';
 
 /**
  * API URL
@@ -30,4 +30,3 @@ export const version = '1.5.0';
  */
 export const apiUrl = '/rest';
 // export const apiUrl = 'http://localhost:8000/rest';
-//
diff --git a/frontend/src/main/javascript/package-lock.json b/frontend/src/main/javascript/package-lock.json
index 4004e6041..48aa4a555 100644
--- a/frontend/src/main/javascript/package-lock.json
+++ b/frontend/src/main/javascript/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "ALEX",
-  "version": "1.5.0",
+  "version": "1.5.1",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
diff --git a/frontend/src/main/javascript/package.json b/frontend/src/main/javascript/package.json
index 569abef57..cf822ce8d 100644
--- a/frontend/src/main/javascript/package.json
+++ b/frontend/src/main/javascript/package.json
@@ -1,6 +1,6 @@
 {
   "name": "ALEX",
-  "version": "1.5.0",
+  "version": "1.5.1",
   "description": "A web application for interring Mealy machines of web applications and RESTful web services via active automata learning.",
   "repository": {
     "type": "git",
diff --git a/frontend/src/main/javascript/src/js/components/modals/project-edit-modal/project-edit-modal.component.html b/frontend/src/main/javascript/src/js/components/modals/project-edit-modal/project-edit-modal.component.html
index e470204e6..1e88a047c 100644
--- a/frontend/src/main/javascript/src/js/components/modals/project-edit-modal/project-edit-modal.component.html
+++ b/frontend/src/main/javascript/src/js/components/modals/project-edit-modal/project-edit-modal.component.html
@@ -8,6 +8,10 @@ <h3 class="modal-title">Edit project <strong ng-bind="::vm.project.name"></stron
 <form name="vm.form" ng-submit="vm.updateProject()">
 
     <div class="modal-body">
+        <div class="alert alert-danger" ng-if="vm.errorMessage != null">
+            {{vm.errorMessage}}
+        </div>
+
         <project-form-groups project="vm.project" form="vm.form"></project-form-groups>
 
         <hr>
diff --git a/frontend/src/main/javascript/src/js/components/modals/project-edit-modal/project-edit-modal.component.js b/frontend/src/main/javascript/src/js/components/modals/project-edit-modal/project-edit-modal.component.js
index 4c165fc55..9bc9febbd 100644
--- a/frontend/src/main/javascript/src/js/components/modals/project-edit-modal/project-edit-modal.component.js
+++ b/frontend/src/main/javascript/src/js/components/modals/project-edit-modal/project-edit-modal.component.js
@@ -52,7 +52,7 @@ export class ProjectEditModalComponent {
          * An error message that is displayed on a failed updated.
          * @type {null|string}
          */
-        this.error = null;
+        this.errorMessage = null;
     }
 
     $onInit() {
@@ -63,7 +63,7 @@ export class ProjectEditModalComponent {
      * Updates the project. Closes the modal window on success.
      */
     updateProject() {
-        this.error = null;
+        this.errorMessage = null;
 
         this.ProjectResource.update(this.project)
             .then(updatedProject => {
@@ -77,8 +77,8 @@ export class ProjectEditModalComponent {
                 this.form.$setPristine();
                 this.form.$setUntouched();
             })
-            .catch(response => {
-                this.error = response.data.message;
+            .catch(err => {
+                this.errorMessage = err.data.message;
             });
     }
 }
diff --git a/frontend/src/main/javascript/src/js/components/modals/symbol-parameter-create-modal/symbol-parameter-create-modal.component.html b/frontend/src/main/javascript/src/js/components/modals/symbol-parameter-create-modal/symbol-parameter-create-modal.component.html
index 802dfc280..780ee8602 100644
--- a/frontend/src/main/javascript/src/js/components/modals/symbol-parameter-create-modal/symbol-parameter-create-modal.component.html
+++ b/frontend/src/main/javascript/src/js/components/modals/symbol-parameter-create-modal/symbol-parameter-create-modal.component.html
@@ -16,6 +16,6 @@ <h3 class="modal-title">Add parameter</h3>
 
     <div class="modal-footer">
         <button class="btn btn-primary btn-sm" type="submit">Add</button>
-        <a href="#" class="btn btn-default btn-sm" ng-click="vm.dismiss()">Cancel</a>
+        <a href class="btn btn-default btn-sm" ng-click="vm.dismiss()">Cancel</a>
     </div>
 </form>
diff --git a/frontend/src/main/javascript/src/js/components/modals/symbol-parameter-edit-modal/symbol-parameter-edit-modal.component.html b/frontend/src/main/javascript/src/js/components/modals/symbol-parameter-edit-modal/symbol-parameter-edit-modal.component.html
index be8d7343b..db1b56b8c 100644
--- a/frontend/src/main/javascript/src/js/components/modals/symbol-parameter-edit-modal/symbol-parameter-edit-modal.component.html
+++ b/frontend/src/main/javascript/src/js/components/modals/symbol-parameter-edit-modal/symbol-parameter-edit-modal.component.html
@@ -16,6 +16,6 @@ <h3 class="modal-title">Edit parameter {{::vm.parameter.name}}</h3>
 
     <div class="modal-footer">
         <button class="btn btn-primary btn-sm" type="submit">Update</button>
-        <a href="#" class="btn btn-default btn-sm" ng-click="vm.dismiss()">Cancel</a>
+        <a href class="btn btn-default btn-sm" ng-click="vm.dismiss()">Cancel</a>
     </div>
 </form>
diff --git a/frontend/src/main/javascript/src/js/components/views/learner-view/learner-view.component.js b/frontend/src/main/javascript/src/js/components/views/learner-view/learner-view.component.js
index 27b8abb07..259fa59de 100644
--- a/frontend/src/main/javascript/src/js/components/views/learner-view/learner-view.component.js
+++ b/frontend/src/main/javascript/src/js/components/views/learner-view/learner-view.component.js
@@ -140,6 +140,11 @@ class LearnerViewComponentComponent {
         this.LearnerResource.getStatus(this.project.id)
             .then(status => {
                 this.status = status;
+                if (this.status.result != null) {
+                    const now = new Date();
+                    const start = new Date(this.status.result.statistics.startDate);
+                    this.status.result.statistics.duration.total = now - start;
+                }
 
                 if (!this.status.active) {
                     this.finished = true;
@@ -168,8 +173,6 @@ class LearnerViewComponentComponent {
                         .catch(console.error);
 
                     this.$interval.cancel(this.intervalHandle);
-                } else {
-                    LearnResult.convertNsToMs(this.status.result.statistics.duration);
                 }
             })
             .catch(console.error);
diff --git a/frontend/src/main/javascript/src/js/routes.js b/frontend/src/main/javascript/src/js/routes.js
index adcaa0001..15987d5f5 100644
--- a/frontend/src/main/javascript/src/js/routes.js
+++ b/frontend/src/main/javascript/src/js/routes.js
@@ -21,7 +21,10 @@
 export function config($stateProvider, $urlRouterProvider) {
 
     // redirect to the start page when no other route fits
-    $urlRouterProvider.otherwise('');
+    $urlRouterProvider.otherwise($injector => {
+        const $state = $injector.get('$state');
+        $state.go('root');
+    });
 
     $stateProvider
         .state('root', {
diff --git a/pom.xml b/pom.xml
index 852558668..5a6acb3ed 100644
--- a/pom.xml
+++ b/pom.xml
@@ -22,7 +22,7 @@
 
     <groupId>de.learnlib.alex</groupId>
     <artifactId>alex-parent</artifactId>
-    <version>1.5.0</version>
+    <version>1.5.1</version>
     <packaging>pom</packaging>
 
     <name>Automata Learning Experience (ALEX)</name>