Blinking error rc battery

[futuraa]

Im experimenting a blinking error at the moment i turn on the drone and links with the rc, i get a blinking error saying rc battery error plz contact manufacture and it goes on and off, the rc has full battery and the green light is on confirming the link with the drone, if i turn off the drone the warning stops. Attached i put a small video clip. Any ideas whats wrong?!?