Inform user to restart Godot in case the engine failed to load the addon

[ltjdyx]

Create BeehaveTree

Cannot get class ''. editor/editor_data.cpp:581 - Parameter "p_object" is null. editor/scene_tree_dock.cpp:2275 - Condition "!child" is true.

[bitbrain]

Does this happen after restarting Godot a couple of times? Currently, Godot has a set of issues where it tries to load classes before having finished its loading/initialization step. So this is nothing we can do about but that is an issue with Godot itself.

[rakista112]

I've been able to get Beehave to work by restarting Godot 4.1.1 after enabling the Beehave plugin. Would it be possible perhaps to give a hint in that error message? "Please restart Godot to finish Beehave setup" or something. If that's not possible, we should pin the fix somewhere or add it to the docs.

[bitbrain]

@rakista112 we may be able to improve the messaging on failed start up for sure, good idea.