It is just stuck at "this may take a few moments" even though I cleared all the mods from it and reinstalled Minecraft again.
Comments 2
Cleaning up old tickets: This ticket had been set to 'Awaiting Response', but has not received a response from the reporter (~3 months+) so is being closed as Incomplete. If you feel this is still a valid issue then please comment, or create a new ticket following the Issue Guidelines which includes steps to reproduce the problem.
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What happens if you close your realm, wait a few minutes, and then reopen it?
If that does not work, what exact (and complete) message(s) do you see when unable to join?
This ticket has been temporarily closed as Awaiting Response. It will automatically reopen when you add information. Tickets that do not contain enough information may be closed as Incomplete.