Thinking more about it, the launcher in the MS edition of this game is a canned installation and doesn't do its own updates, so they won't be there.
In which case I don't know why the launcher will not work for you! Especially as the identical launcher used to work. Does the Gamepass edition still work?
Does it make any difference if you launch this game from the Xbox app or the MS store app?
And can we see the launcher logs which should be in C:/users//AppData/Local/Paradox Interactive/launcher-v2/logs/
In which case I don't know why the launcher will not work for you! Especially as the identical launcher used to work. Does the Gamepass edition still work?
Does it make any difference if you launch this game from the Xbox app or the MS store app?
And can we see the launcher logs which should be in C:/users//AppData/Local/Paradox Interactive/launcher-v2/logs/