Software version is usually the main cause for this. It is recommended to keep your camera software up-to-date. Follow the instructions in the GoPro's troubleshooting page.

There could be a few reasons to why the camera will not record. It could range from the SD card to your capture settings. Using the GoPro troubleshooting page, test the different fixes to solve this issue.

Please use the troubleshooting page found here. It is a simple process to reset your camera by going into your camera settings.