Garage door arm ripped out of door
The best way to fix this would be to drill the existing holes through the door out the front. Then get some bolts, washers and nuts. Put the bolts and washers from the outside in through the door. Mount the arm to the bolts, then washers and finish off with nuts. Tighten and you're good to go. Oh, and disable the sliding lock. Good luck and stay safe out there.