Deserialised a mod that we don't recognise - can't play

Same, was also portaling back to hideout from a map when I got this error. Now trying to logon to the character gives me "buffer underflow".

Other characters still work though but that character can't be logged onto anymore.

Fixed for me now.

working now, must have been a server hiccup

I had this issue when trying to join a specific player's hideout.

It would only crash my scourge character and validating steam files and relogging didn't fix it.

I was able to consistently fix this issue in my case by logging into a different character, and then log into my scourge character.

I was able to reproduce the issue when asking to trade the same player and trying to connect to their hideout again.

help

It's fixed for me.

+1
Getting this frequently
https://i.imgur.com/mz8MiJO.jpeg

I am able to replicate it when opening the harvest crafts, then clicking the stash button.