Fix: Key Not Valid for Use in Specified State – TF31001 - Team Foundation Server
While attempting to make a connection to Team Foundation Server, you get the following error message.
TF3001: Cannot connect to a Team Foundation Server at “”. The server returned the following error: Key not valid for use in specified state. Retry.
There is most likely a corrupt cache inside the Team Foundation Cache folder. Delete the following items in this folder:
C:\users\username\Appdata\Local\Microsoft\Team Foundation\3.0\Cache