It happens that Jim GM4DHJ ... formulated :
it's on the outside....

just went out and sprayed the tracks with wd40 and it opened so I took the
car out put the door back down thinking I could cancel the man...came back
wouldn't go up on the remote......went inside gave the door a rattle and
pushed the button on the unit it went up ...seems to be some kind of
intermitant so not cancelling the man...and it's not a faulty rmote
either...

I'll go and do a video right now.....probably work ok if I do


https://www.youtube.com/watch?v=WbePThXXPyA

Jim - It is pretty much the same as my door, except my door is inside
yours on the outside. Even the manual winder is on the same end of the
mechanism - the left looking at the roll and the motor is on the left.

My best guess is that it was sticking in the tracks, drawing too much
current, so the controller shut it down to prevent damage. The current
limit might be adjustable, maybe set too low - ask your guy when he
turns up.