I am unable to upload my local world to my Realm, I have used both the 'Reset World' and 'Replace World' functions. 
The world is only 38,6Mb and says it it 0Mb/0Mb, so it finish instantly, and then says Error.
No error messages are received and it cannot upload 38,6Mb instantly with my internet, it should take at least 30 seconds.
This is the first world I've tried to upload as I just started my 30 day free trial for Realms.

Have tried uploading different worlds and the same thing happens, therefore I won't attach the world to this ticket.
Have even gone as far as to try and upload it from a different PC but the issue persists.

See files attached, they are in the same order as it happens to me. (dab, lol, echec)