Realms will not upload any world file it always fails at the verify world stage, it doesn't matter if the world is brand new generated,, an old world, a world with datapacks or a world without it fails consistently every time. I have also tried uploading from multiple internet sources and separate PCs with no change.
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violine1101
migrated
Thank you for your report!
We're actually already tracking this issue in REALMS-2146, so I resolved and linked this ticket as a duplicate.
If you would like to add a vote and any extra information to the main ticket it would be appreciated.
If you haven't already, you might like to make use of the search feature in the future to see if the issue has already been reported.
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