If you have any of these issues when trying to verify your email or link your Klei account:

"The authorization state is invalid, try again"

"Session has expired, you have to log in once again"

It might be because you have the Steam app installed on your phone. Try to delete it and redo the linking process !

If you don't have the Steam app installed and the session still expire, a new update is available and should fix your issue!