You may have tried those already, but just in case, two known current issues:
Browser app database is outdated: Run
sudo update-desktop-database /usr/share/applications (Linux only)
The other one is an out-dated cache of the identity manager:
Download: /opt/Autodesk/AdskLicensing//helper/AdskLicensingInstHelper from https://damassets.autodesk.net/content/dam/autodesk/external-assets/support-articles/licensing-support-tool/AdskLicensingSigninHelper-2.5.2.1579-linux.tar.gz
Then run this (as sudo):
AdskLicensingSupportTool --clean-cache
I’ve had to use both of those a few times recently and both brought Flame back. But your mileage may vary.
And the ADSK licensing deserves its own special place in purgatory for still being so unreliable in 2026. If they can’t figure out the code themselves, they might want to ask Claude for help. It may have a few suggestions.