This may happen if your network connection is temporarily disrupted or if your data connection is blocking 1.1.1.1 connections:

• Disable the app using the toggle on the app home page.
• Open the iOS Settings app and navigate to Settings > General > Reset.
• Tap on Reset Network Settings.
• Reboot your device; make sure your Wifi is connected.
• Try connecting the app again.

If this does not allow the connection, disable the 1.1.1.1 app and send us a bug report.