Please kindly make a check by following steps:
1. Please make sure your camera is original SJCAM ACTION CAMERA and also download the latest APP in aforementioned channel.
2. Sometimes when SJCAM is updating a new APP (IOS or Android operating system release a new version), it would show only a temporary disconnection. After update is completed, new APP will be available for using.
3. When above case happened, definitely SJCAM will take urgent action to get APP back to normal.