Unexpected Error: Steam Deck

[Guillaume]

I got twice on my Steam Deck an in-game popup saying "An unexpected error has occured" after presenting evidence.
I wonder if it has to do with the Internet connection or Steam Cloud.

Despite this, I can still continue to play the game as if nothing happened. What is this error? Can I ignore it?

[Pikelwu]

you can ignore this but i dont know how to fix this

[Ratirefure]

This happens in Ghost Trick as well, it may be that you're collecting achievements while disconnected from the internet AND not being in Offline Mode in Steam (thus the game tries to contact the Steam achievement server, and can't).