I made a new world and was able to upload that, but the one I am wanting to play on realms will not load.
The one I am trying to upload to realms is
19.0 MB, with no skins and no datapacks/resources.
I am hoping this gets fixed, I would like to keep my realm subscription, but no point in resubscribing if the main feature is unavailable.
When attempting to upload world to Realms it will rename the realm but fail when uploading.
World Export finished successfully message appears but hangs on Initializing Upload.
Then displays "An Error Occurred" message.,
Wow I can't believe that this worked, but I had to slow my network like @theshadow27 said.
I ended up having to use a double VPN then connecting to new zealand to slow my network down enough for the upload to work.
It had to be slow, any fast VPN or no VPN would not work for the upload.
That is crazy.