Same here.
I installed Ubuntu 20.04.5 LTS (in VMware Workstation 17), then executed script from Jim.
Next, in Delphi 11.2.1 I added connection profile, so it automatically fetched SDK files from Ubuntu.
Next, using GetIt I installed FMXLinux.
Created new multi-platform project with proper connection.
I can compile project, and run without debugging.
But as soon as I try to debug - "Project LinGuiApp raised exception class Stop (17).".
Also, I noticed that when I try to debug the console app, it works.