Can't replace world on realm, xbox one, keeps failing

Hi 

I play on xbox one.

 

Have recently bought realms and I cant seem to replace the realm with my own one, it keeps displaying "Failed" "An error occured" after it says the world has successfully been exported. I have tried using a ethernet cable and tried doing it at about 1am to 3:30am, but no luck, is there anything I can do ? The world is 215MB.