Won't boot past Firevault login screen.

The computer boots up and I login and it won't go past the Firevault login screen, the loading bar is slow and when it's full it's just hangs

I tried ASD and it found not issues

Booting into disk utilities is the same thing, it boots and loads slowly and hangs at the apple logo.

Tried safe mode and nothing changed

Charging was weird at the start, I would plug in my charger and no lights but now it works normally.

Finally my friend who works at the apple store did a diagnosis and it said "Management engine failure". I have no idea what that means though.

Thanks to everyone that can help!!