The movable box spawns ontop of a breakable crate. Then is unmovable. This is on Xbox
Tired reloading, moving away. I visited the area before the quest line.

The glitch worked for me on Xbox, so happy!
Keeping pushing forward facing the movable object tapping Y to start the animation and b to back out of it until you phase into the object.
Then once inside dont move just rotate the camera so you back is against where the door is and click b. You are now stuck between the movable object and the door.
Move the camera again to find the white dot to open the door and your through!!
Don't worry about getting back out as it cut scenes once you find the priest.
Took about 10 mins of faffing.

@ubi-spud please sort this out. Same problem Xbox series X
Any idea of patch?

The movable box spawns ontop of a breakable crate. Then is unmovable. This is on Xbox
Tired reloading, moving away. I visited the area before the quest line.