Managed to resolve it and the issue definitely was connected to my Larian account.
Once I disconnected it from GOG and PS it worked fine, if connected back it still crashed. I deleted my Larian account and made it again with the same email. Everything worked fine now, but didn’t want to sync saves. So, I deleted it again, made an account with different email, reconnected GOG and PS and voilà - everything works and syncs.

Sad it doesn't just say "hey bad email, do another one" instead of crashing on loading

Last edited by Max Lemesh; 24/09/23 09:24 AM.