I have the latest firmware and the last time I flew the camera worked fined. Now I only get a grey gradient (dark at the top and light at the bottom) in my app. I've tried both a tablet and a phone with the same result. I've recorded video and taken photo and that works.
Between the gimbal unit and the drone itself there are two grey flat wires. One on it's right side by the USB port and one more hidden in the back of the gimbal unit. It was the one in the back that had loosened.