ARKit Session Not Resuming After Changing Screen

In my ARKit app When I close the ARSCNView and go back to the ARSCNView then I find out that the session is paused due to this code:

 override func viewWillDisappear(_ animated: Bool) 
{
            super.viewWillDisappear(animated)
            // Pause the view's session
            sceneView.session.pause()
        }

When I close the ARSCNView and go back to ARSCNView screen the app gets Crashed because of this code :

            super.viewWillAppear(animated)
        
            // Create a session configuration
            let configuration = ARWorldTrackingSessionConfiguration()
        
            // Run the view's session
            sceneView.session.run(configuration)
        }

But this code never resumes the session. The screen is completely frozen.. Anyone can help me out?