@MojangSupport today I am trying to replace my realm with the world i built. I was able to do the replacement yesterday night. But this morning Im getting "An error occurred" message when uploading my world.
Please check our FAQ at https://help.minecraft.net/hc/en-us/sections/360004954931-Minecraft-Realms …. If you still require assistance with your Realm, please send us an email at https://help.minecraft.net/hc/en-us/requests/new … and we will assist. Remember to describe the issue, provide the name of the Realm, and your Username/Gamertag. ^JS