Backup Camera Unavailable

2017 Edge. I have been dealing with the camera problem (Camera Unavailable) for several months also and I may have found a fix. Go to settings/vehicle/camera. Slide both sliders on and off. Possibly a few times. Turn to top slider to on, then the bottom slider (Camera Delay) off. After a couple of tries, camera seems to be working fine. Worked for me. I hope it works for you.