10-10-2019 01:54 PM
@nerv, sorry to hear about the trouble. Please ensure to have the latest version of the app and iOS on your phone installed. Then have your mobile device restarted before attempting to pair the camera with the app again.
If the issue persists, there are some troubleshooting suggestions here https://community.gopro.com/t5/en/Troubleshooting-GoPro-App-Connectivity-Issues/ta-p/392964 that will help resolve the issue.