GOAL ASLX, the handle comes off and the door won't open

"Unlocking the entrance door due to handle defect"

When he tried to open the front door, the handle fell off and he was unable to enter the room.

I was wondering what the condition was, but when I arrived at the site, parts of the handle had fallen off. However, it was a handle without a shaft. When I looked at the door, I could see part of the shaft. It would be easier to do the job if you dropped the handle along with the shaft into the room, but it would damage the handle and the floor, so I unlocked it in a way that wouldn't cause it to fall. I fixed the partially visible shaft with a tool and turned it to unlock it.

The set screw that secures the handle had completely come off, and the screw was missing as well. It's an M6 set screw, but the female thread part also seemed to be damaged.I recut the tap and installed it.