Update class.ilSoapRBACAdministration.php

removed the unnecessary check with the assignUser() Method.

webservice/soap/classes/class.ilSoapRBACAdministration.php

@@ -115,12 +115,7 @@ public function addUserRoleEntry(string $sid, int $user_id, int $role_id)
             return $this->raiseError('Check access failed. No permission to assign users', 'Server');
         }
 
-        if (!$rbacadmin->assignUser($role_id, $user_id)) {
-            return $this->raiseError(
-                'Error rbacadmin->assignUser()',
-                'Server'
-            );
-        }
+
         return true;
     }