Realm does not want to finish uploading.

I am trying to upload one of my survival worlds to my realm. It starts out with 0mb/0mb, where the progress bar slowly fills up. Once full, the screen transitions to the, "Initializing Upload," screen, where it only spends a few minutes. The next screen it moves to is the real problem. It comes up with the progress bar completely full and says 46.7mb/46.7mb complete. It then sits there with the bar completely full and doesn't do anything after that. The game doesn't freeze, because I cancel it at anytime and it'll respond immediately. I've attempted to upload and leave it on this screen a few times. Waiting anywhere from 5 minutes to 7 hours for it to finish up, but it never does. It continues to sit on this screen. Please help!