Resolve Rollback issue

Author: hiren0241

app/code/Magento/Backup/Controller/Adminhtml/Index/Rollback.php

@@ -82,7 +82,9 @@ public function execute()
             }
 
             if ($this->getRequest()->getParam('maintenance_mode')) {
-                if (!$this->maintenanceMode->set(true)) {
+                $this->maintenanceMode->set(true);
+
+                if (!$this->maintenanceMode->isOn()) {
                     $response->setError(
                         __(
                             'You need more permissions to activate maintenance mode right now.'