One possibility is a bad SD card.
I have already replaced the Gimbal motor ESC board, but it's still the same. I am planning to replace the Gimbal camera IMU board located at the back of the camera case.Please helpTilt motor or gimble motor esc board (controls all 3 gimble motors), not difficult to replace. Thankfully I keep spares so trial and error is simple. Drone tools are your friend.