The quick help window labels the values for this input as "token (empty: PythonServer)". This is non standard and consequently - misleading syntax. The Empty keeword is implicty (default), so a standard syntax would be
The quick help window labels the values for this input as "token (empty: PythonServer)". This is non standard and consequently - misleading syntax. The Empty keeword is implicty (default), so a standard syntax would be