I was setting up servers using the root user before I moved on to create my own user. I created a new user called ‘ADMIN’ and gave it the home of /var/games/minecraft. I am making a server on the latest snapshot, and receive the ‘Required JWT [user] not specified’ when joining. I have been able to join my own servers before I made the new user.
Now, even if I create a root user server I get the same joining error.
I will continue to look for solutions on my own and if I find any I will update this post. Thank you for any input provided.