[Tuna-Fish]

You need to update the client to fix that. Easiest way to do this is to evade the beta check (start steam with "steam steam://store"), then choose "steam/check for steam client updates" from the title menu.

[mariuolo]

I did that. For some reason I also had to delete ~.steam and ~.local/share/Steam and start from scratch to be able to log in.