Do not crash Syncsketch addon if it cannot connect to the Syncsketch server due to wrong server or credentials

server/__init__.py

@@ -108,15 +108,38 @@ async def create_syncsketch_webhook(self):
             "Content-Type": "application/json",
         }
 
-        existing_webhooks = requests.request(
-            "GET", syncsketch_endpoint, headers=headers)
+        try:
+            existing_webhooks = requests.request(
+                "GET", syncsketch_endpoint, headers=headers)
+        except requests.exceptions.ConnectionError:
+            # This could happen if the SyncSketch API is not reachable
+            # with e.g. authentication issues, or the server is down.
+            # Usually with a "Max retries exceeded with url" message.
+            logging.error(
+                f"SyncSketch API connection error at: {syncsketch_endpoint}")
+            return
+
+        if existing_webhooks.status_code == 404:
+            logging.error(
+                f"SyncSketch API is not reachable at: {syncsketch_endpoint}")
+            return
+
+        # In some cases the JSON response may not be retrievable and could
+        # end up with a JSONDecodeError if the response is not JSON.
+        try:
+            existing_webhooks_json = existing_webhooks.json()
+        except requests.exceptions.JSONDecodeError:
+            logging.error(
+                "Unable to decode JSON response from SyncSketch API: "
+                f"{existing_webhooks}")
+            return
 
         if existing_webhooks.status_code == 400:
-            logging.error(existing_webhooks.json())
+            logging.error(existing_webhooks_json)
             return
 
-        if existing_webhooks.json():
-            for webhook in existing_webhooks.json():
+        if existing_webhooks_json:
+            for webhook in existing_webhooks_json:
                 if (
                     webhook.get("url") == ayon_endpoint
                     and webhook.get("type") == "all"