Can't create a termbase from Studio2019

What shall I do, to get back to work.

Methode nicht gefunden: "Sdl.MultiTerm.Client.Connectors.ServerPrivilege Sdl.MultiTerm.Client.Connectors.ServerProxy.LogIn(System.String, System.String, System.String, Boolean, Boolean, Sdl.Enterprise2.MultiTerm.Client.IdentityModel.PersistOption)".

Thomas