I have 4 DJI air units, and 3 work fine, but one keeps giving me an error message " Image transmission stopped" I have refreshed the controller, and the air unit and tried to refresh the goggle but get an error "transmission failed"  HELP!!

I got it figured out, I had the red wire off of the DJI air unit connected to +5, it needs to be connected to BAT, and the ground needs to be connected to the ground next to it on a  iFlight, Sussex -D F7 TwinG flight controller. Great picture no error messages.