fix error message problem

src/vitis/vas/rest/ws/vitis/Users.class.inc

@@ -676,7 +676,7 @@ class Users extends Vitis {
         if ($this->oConnection->oError == null && in_array("vitis_admin", $this->oConnection->aPrivileges)) {
             $aReturn = $this->genericDelete($this->aProperties['schema_framework'], 'v_user', 'user_id');
         } else {
-            $oError = new Error(1, "Invalid token");
+            $oError = new VitisError(1, "Invalid token");
             $aXmlRacineAttribute['status'] = 0;
             $aReturn['sMessage'] = $oError->asDocument('', 'vitis', $this->aValues['sEncoding'], True, $aXmlRacineAttribute, $this->aValues['sSourceEncoding'], $this->aValues['output']);
         }