after newest update, I can't connect to multiplayer

When I try to connect to a server in garrys mod I get a “this steam account is used on another computer” Even though if that was the case, I wouldn’t even be logged into steam at the moment. When I open the console, I get the error messages below:

Disconnect: This Steam account is being used in another location
.
Disconnect: This Steam account is being used in another location
^this

and before you guys ask:

  1. Other games work
  2. I’m the only one with access to my account
  3. Other games work
  4. other games work

It seems that the update broke gmod, because it won’t let me connect where as every other steam game works, any suggestions?

Delete clientregistry.blob in Steam/

thank you, it worked.