In case it helps anyone: In my case it was the stabilizer cable...this is more difficult to see as it's between the camera and the main body... took me a while to see it was disconnected.
I had to go from the opposite side to where is supposed to be connected, so I only saw disconnected when I removed the GPS. Then I pushed it back to the bottom side and reconnected it. Attaching two photos
Photo 1. Shows it disconnected, the photo is taken from from where the GPS should be connected... it that photo it looks evidently loose but when I found it, it was hidden in between the other cables.
Photo 2. Holding the cable with the tweezers and pointing to where it should be connected. photo taken from the bottom of the drone.