Sign in to GP Cloud fails with "Lateinit property controller has not been initialized" message

ERROR:
Something went wrong
lateinit property controller has not been initialized…

NOTE: I cannot connect to the Gantt Cloud, it shows me this error and I cannot select the created projects.

May I ask you to provide some more details? Where do you see this message? If you see it in the error notification, then please post the contents of the error log (Help > View log).

I am seeing the same message what I click “Sign in” for GanttProject Cloud. I am on a MacBook Pro M1.

Here is my error log:
ganttproject.log (151.2 KB)

How do you open the pane with “Sign in” button? Can you record a screencast?

I am doing it through the project properties modal. I am attaching the screen recording.
GanttProject.mov.zip (2.7 MB)

I see, thanks. Does it work if you use Project > Open and then sign in from GanttProject Cloud pane?

Submitted a new ticket to the tracker:

Yes, that method works. Thanks! Let me know if you need any more information.