Newly invited users to realms are rejected when logging in.

*It's realms, so there shouldn't be whitelist issues to begin with, and the user should have been able to login.

*But in contrary, they (we had two newbies) are getting the same message "You are not white-listed on this server".

We had a different person who was already an user saying that he had the same problem but was able to solve it by restarting the launcher and the game, so we asked the newly invited user to do the same, but still got the "not white-listed" message. We also had the user delete the realm, and re-inviting, but that didn't work either.

When our OP tried "/whitelist list" to see if whitelist was on or not, I was rejected because I was not permitted to that command.

This started to happen right after realms was updated to 1.12.2. We had no issue like this in the older versions.

Steps to Reproduce:
1. OP invite a new user to realm.
2. New user accepts the invitation.
3. New user attempt to join the game in the wold he was invited to.