title: How to fix Unable join_cluster rabbitmq
body: <p>I have 2 nodes rabbitmq01 and rabbitmq 2 before i do join_cluster i checked the status of these 2 nodes
  <a href="https://i.stack.imgur.com/AzpZC.png" rel="nofollow noreferrer">enter image description here</a></p>
  <p>Then I stopped_app and did join_cluster but the error came again
  <a href="https://i.stack.imgur.com/avl3H.png" rel="nofollow noreferrer">enter image description here</a></p>
  <p>I also tried to check the version of the erl of 2 node
  <a href="https://i.stack.imgur.com/tt6Yw.png" rel="nofollow noreferrer">enter image description here</a></p>