I wanted to stop greifing on my realm, so I created a copy of the world with fire spread and TNT explode off. Beforehand when I uploaded a copy, I had canceled when it said initializing upload, as it had successfully replaced the world anyways. However, when I did it this time, it would not let me join the game. It also did not let me replace the world with a backup. I was forced to reset the world, and now when I try replacing the new world with the old copy, it is no longer stuck on the screen saying "This may take a few moments, but it loads me into the world I was trying to replace in the first place.

Edit: I would like to also mention that when I try to let the "initializing upload" message run its course, it seems that it will go on forever