Import Robot from URDF stays greyed out

[snowgoon88]

Describe the bug
I followed the "pick_and_place" tutorial and when trying to import the nyrio_one.urdf file by right-clicking, the "Import Robot from URDF" option stays grey. No possibility to import the URDF.

Console logs / stack traces
the only message in the console are warnings

Script 'Joint' has the same name as built-in Unity component.
AddComponent and GetComponent will not work with this script.

Assembly for Assembly Definition File 'Assets/RosMessages/Unity.Robotics.RosMessages.asmdef' will not be compiled, because it has no scripts associated with it.
UnityEditor.Scripting.ScriptCompilation.EditorCompilationInterface:CompileScriptsNoStop (UnityEditor.Scripting.ScriptCompilation.EditorScriptCompilationOptions,UnityEditor.BuildTargetGroup,UnityEditor.BuildTarget,string[]) (at /home/bokken/buildslave/unity/build/Editor/Mono/Scripting/ScriptCompilation/EditorCompilationInterface.cs:306)

Screenshots
file is selected, right click on it

URDF package seems to be imported in Unity

Environment (please complete the following information, where applicable):

• Unity Version: Unity 2020.3.11f1 Personnal
• Unity machine OS + version: Debian 12 Bookworm
• ROS machine OS + version: Ubuntu 18.04, ROS Melodic
• ROS–Unity communication: Docker
• Branch or version:
  • for https://github.com/Unity-Technologies/Unity-Robotics-Hub.git
    a72ef3a (HEAD -> main, tag: v0.7.0, origin/main, origin/HEAD) Release 0.7.0