Probably just a mater of making certain that nothing is in the way inside, and correctly aligning the door.
Is that screw captive, that is won't fall out? If so then you may need to start running in the screw before the door will shut completely.
Don't force anything.
As shown in the photo, the door has shifted/moved forward. I had to use a fair amount of force to get the door to slide back down (close the gap) in order for the door to fit back into the recess and allow the screw to be used. The door looks like it has a very slight curve to it now that I've tightened the screw. The door is definitely not right, but at least closed.