When I'm trying to change my realm settings on Nintendo switch, it is stuck on the "Fetching Realm Information" screen for about 15 to 20 mins, and when I'm trying to replace the world on the realm, it says "Error: We couldn't pack your world file for upload. Maybe your hard drive is full?" even though I have plenty of space remaining.

By the way, I made the purchase for realms on Windows 10, if that helps.