Can't import mesh, HELP!

Hello! My friend is making me some models in blender for me to use in my game. Most models work, but some freeze the editor when i try to import them (the loading bar always gets stuck at 5%). Does anybody know what the problem is?

Wait it out

What sort of polycount are you trying to import? If its a massive amount it will just take a lot of time.
Depends on your pc specs.