Lost connection to perforce


I suddenly lost connection to perforce. I am on UE 4.16. I was connected like month and now I am unable to connect.
If I try to connect it says: “No workspace found!”
If I try to type workspace manually it says : "Failed to connect to source control. Check your settings and connection then try again.
But workspace exist and I am connected to to perforce in Visual Studio but not in UE anymore.

Any advice ?