Thank you very much for your help, and also indeed for your contributions, towards an evolving ui framework.
Yes I will have to remove the OpenDark for now, if I can. I would appreciate some help for that.

Whatever the default theme may ultimately be...
Is there a way for the user to lose the opendark entirely, and activate the standard ui environment?
Thanks for any suggestions.

I'd like to mention this, since it looks like a related issue. (Seems to have happened before, and was fixed). Addon Manager freezes Freecad while fetching metadata. Thanks all. OS: Debian GNU/Linux 11 (bullseye) (KDE/plasma) Word size of FreeCAD: 64-bit Version: 0.21.30988 (Git) AppImage Build type...

Thank you Chris.
You guys rock, and much appreciated.

Results are identical for the last few builds of 0.2.1. Command line start and output: FreeCAD 0.21, Libs: 0.21R31097 (Git) © Juergen Riegel, Werner Mayer, Yorik van Havre and others 2001-2022 FreeCAD is free and open-source software licensed under the terms of LGPL2+ license. FreeCAD wouldn't be po...

Waiting could have addressed possible latency issues on the git side, and/or elsewhere. Just to cover a probability to some degree. Anyway the state of hang here, seems to be an endless loop, and it doesn't seem to trigger a kill. I don't know whether there are any error checking for this sort of th...

The first shot is the frozen state after about 20min. of wait. Addon_Freeze_20221126_180925.jpeg The second shot has some info about the status of the addon manager. Process_Status_20221126_181156.jpeg Thirrd is the crash message after closing via the app ui. Addon_Crash_20221126_180925.jpeg Thanks ...

Thanks for looking Booting Freecad after an "Addon manager" crash, the report view displays: 10:54:24 NOTICE: Addon "/home/ev/.local/share/FreeCAD/Mod/Render.backup1663790588.0453942" disabled by presence of ADDON_DISABLED stopfile 10:54:40 Recent macros : keyboard shortcut 1 dis...

I tend to think that it's likely a result of some weirdness in my setup. Yet I'd like to know if anyone has run into this condition. Addon manager hangs before it gets done checking the repository, i.e., it becomes unresponsive. Clicking on "Close" for example, crashes and terminates Freec...

Thank you so much to you and to devs and all, for all their phenomenal contributions