To ensure VNC Server for iOS is fully functional, you will need to ensure that Notifications are enabled for the VNC Server app, as well as during screen sharing sessions.

VNC Server app settings

To enable Notifications for the VNC Server app, please follow the below steps:

1. Open the Settings app on your device
2. Scroll through the list on the left hand side, and tap on the VNC Server option then tap Notifications
   
   
   
   
3. Tap the Allow Notifications switch to enable it
   
   
   
   

Screen Sharing settings

In addition to enabling Notifications for the VNC Server app, you must also enable Notifications to be displayed during Screen Sharing sessions to successfully accept or reject incoming connections to VNC Server.

To enable them, please follow the below steps:

1. Open the Settings app on your device
2. Tap Notifications on the left menu, then tap Screen Sharing
   
   
   
   
3. Tap the Allow Notifications option to enable it