Hi everybody, I have solved my problem. Checking others thread I have found this:
It seems the system user had been given an additional role with status range authorization and the system user should only have one role (System Adminstrator role) To check how many roles the system user has: SELECT * FROM rep_roles_per_account WHERE rpa_acc_oid = 1
If there are more than one role attached to account 1 (=system user) than delete this relation role & account with this statement: DELETE FROM rep_roles_per_account WHERE rpa_acc_oid = 1 AND rpa_rol_oid != 2;
Throw away all the cache and restart server and than restart client.