Hi, this is an old problem people continue to walk into. The problem is people upgrade their OS, and then the fog installer fails.
While some people have had success with this, I need more fingers and toes than I currently have to count those who’ve had issues with this approach.
The most safe and sure way to move to a newer operating system is to build a new fog server using that new operating system, and then migrate to it.
I’ve put a lot of time and effort creating an article on how to do this, I believe all the steps should still be valid. It is here:
https://wiki.fogproject.org/wiki/index.php?title=Migrate_FOG
It’s possible you can resolve your issue - but this isn’t guaranteed. It’s also possible that you resolve this one issue, only to immediately face yet another issue. I would advise migrating to a completely new server because this is the safe and sure pathway. I can also tell you that 22.04 daily clean installation tests are passing, meaning that you’d have good results with a clean install on 22.04 (results in my signature).