Could it be that you’re trying to pushback before all the ground services have completed “disconnecting” or backing off and the error causes you to get stuck?
I believe I am experiencing same issue. Standing on a gate with pax, catering, cargo and gnd power connected. When I disconnected all and attached push tug. It now says I need to disconnect all ground services. A320 if that matters. Only Nav lights on.
thanks for everyone’s replies, but, correct me if im wrong, have done everything i need to do before commencing pushback including turning off the parking brakes, disconnecting ALL ground services and turning on beacon lights (i think)
ps: i also tried pushing back with beacon lights off, but it didnt work