A little baffled, getting a hard error when I turn on the contoller. DJI splash opens then, Error (DJI Go 4 Has Stopped). Please help. Assistant 2 will not recognize controller when plugged in. Bird is fine. Is there a hard reset feature I can try. Have tried C1,C2,Shutter button, controller led lights up green/blue aqua color instead of normal green but, still no joy.

Please try to reset the RC from here: Settings--system settings--Backup&Reset–Factory data Reset