Let's do a little logical thinking here.
If the gimbal does its power on movement then the gimbal and cable to it from its controller in the AC are functional.
If you can view the camera, then the camera system and communication from the AC is functional.
The AC sees the gimbal and is getting data but does not like what it sees, so you are getting an "incompatible gimbal data" message.
Therefore, any commands to it from your Controller are ignored (or maybe the Controller isn't even sending the commands because of the error).
If that message appeared ***after*** your "minor" crash, then I would ***first*** suspect a dislodged cable in the AC.
But after that, a damaged PCB is a possibility.