Small fix

agent.py

@@ -585,6 +585,9 @@ class VRWLDAP():
 
             # Add correct machine
             # The naming is very confusing. But from the 'old days' it was Shared for Basic, and Premium is Small :(
+            if workstation is None:
+                return (members_dn, None)
+
             if workstation in ['premium']:
                 workstation_dn = f'cn={matches.group("group_name")}:WS:Dedicated:Small,{group_dn}'
             if workstation in ['standaard', 'basic']: