Tying with hardpoint
Clip to the hardpoint and load it slowly with your own weight first, watching where the fixing meets the ceiling.
How it is done
A hardpoint is a fixing installed to carry a person — through a joist or a structural beam, rated, and known to be rated because somebody put it there on purpose. Anything else is a hook in plaster. Clip on, take the load gradually while watching where the fixing meets the ceiling, and keep everything in this app to a fold or a stretch with the feet down rather than a hang.
What goes wrong with this one
The failure nobody plans for is the fixing rather than the rope — and it fails all at once, with a body already in the air.