So I have this existing realm with a world on it working perfectly but the owner (my cousin) doesn't play anymore and we're trying to transfer the ownership of the realm to me. Working together, me and my cousin were able to download the world on my computer, but when I got to transfer it to a realm, either by uploading it or replacing the world on a realm I have the same error message poping "An error occured" (See the image below). Also while I'm here, I can't find a way to delete old closed realms that I had, they're still on my menu of worlds/realms and it's pretty anoying so if you could help me with that, it would be very appreciated.(I also added a picture of this)