OK, none of the possible errors (like setting the trigger to parallel or activating direction fix or a few others) has happened here. So now on to a few more uncommon causes.
1) Is that a regular door sprite or a custom one? Some custom ones might be of the wrong structure
2) what exactly happens on triggering? does the engine freeze or can the player walk away from the door after that? If the game freezes the problem is likely elsewhere and only accidentally detected on this event.
3) Is the transfer destination on the same or a different map? What happens if you make another quick event next to this door that goes elsewhere?
If none of the questions above points to the cause, then most likely something in the engine has been broken by a script or a script-edit, and looking for that is much more difficult.