About ‘versions do not match’ issue
When you and your friends are using different game versions, the message “versions do not match” will appear.
More article here for the question:
<<<<<<<<<<YOU’RE NOT USING THE SAME CLIENT VERSION >>>>>>>>>>
Not will all servers be updated at the same time. some will update earlier, some later, which may make the versions different for different servers. After the update for all servers, you will be able to play together again.