I've been having this same issue. Months ago it happened the first time, after inspecting everything and doing a bunch of other troubleshooting, I did a rebind scanning the QR code. I was amazed that this solved my problem......for a while. Now after a couple months working error free, using both android and IOS operating devices, the problem has returned. Tried the rebinding again, did all the inspections, blah blah blah, and this thing just won't shake this issue. Real annoying having this expensive paper weight laying around, sure I can still fly it, have all the telemetry data.....but the whole point is it's a flying camera....and the camera will give me no picture. Frustrated and all out of ideas.
No solutions to this yet?!