@MojangSupport Whenever I try to export a world to my Realm it keeps saying an error occur at the end of the process each time, what should I do?

Let's have our Realms team take a look! To keep your information secure, please complete our request form at aka.ms/Minecraft-Support so we can quickly and safely assist with your question! ^BT

The issue seems to have resolved itself thankfully :) It seems like after creating a Realm or reactivating it, you need to wait an hour or two before trying to upload a world. Thank you for replying though it shows that you all are on top of it!