Glock Slide Help Plz

Hey guys, I’m not sure if this is the right group for this. But I tried changing out the back plate on my Glock 19x and now my slide won’t close a round in the chamber. Plz be kind, just starting to get into customizing and learning.

Hey guys, I’m not sure if this is the right group for this. But I tried changing out the back plate on my Glock 19x and now my slide won’t close a round in the chamber. Plz be kind, just starting to get into customizing and learning.