I recently purchased realms plus on my iPhone 8. I have been working on a world for roughly a year now and was pretty excited to upload the world to a realm. To my disappointment, my realm would not replace the realm with the message "An Error has occurred". 

I have tried:

• Transferring the world to my PC and doing it on the windows 10 edition
• Logging out and logging back in to my Xbox Live account 
• Closing and opening my realm to refresh it
• Purchasing a completely new realm (still did not work)
• Resetting the realm and uploading it

However, the problem still persists and I am currently unable to upload it.

How do I know it's only a problem for mobile players?

I have asked many other mobile realm owners who experienced the same issue. However, Windows 10 players were able to upload theirs after a few tries.

I also transferred my mobile world to my PC which still didn't work. However, all my worlds on windows 10 worked perfectly and were able to upload onto the realm.

Also, I went onto a website that allows you to download worlds into your own game. I realized pretty quickly that every map made on mobile would not upload onto the realm. HOWEVER, all the maps made on windows 10 edition worked PERFECTLY.

I have also found online that this is an extremely common issue.

Thank you for reading my message. Please fix this ASAP because I am not the only user experiencing this issue. as shown above.