• We have updated our Community Code of Conduct. Please read through the new rules for the forum that are an integral part of Paradox Interactive’s User Agreement.
Showing developer posts only. Show all posts in this thread.
Ubuntu is the only version we support yes. As for Stellaris not updating, well, that's because Stellaris is no longer supported on the standalone launcher (and neither is HoI 4) so you'll never be able to get newer expansions or update it to the latest version.

I don't have much to tell you I'm afraid, the standalone launcher is a bit of a fickle beast at times, and since it sounds like you're running a Linux version we don't support it's possible this is the cause but I can't say for sure.