I don't see your picture, but I am guessing it's a blank image while in reverse.
That is what happens if the module is unplugged on the Highline setup.
If you want to confirm for yourself and have a multimeter, I would test power at the unit and see if the can bus connection has the correct resistance at the module.
HOW TO TEST CAN BUS WITH A MULTIMETER [CAN Bus Resistance Check] Mechanic Mindset - YouTube
Here are the pins to test.
Bookmarks