How this guide works is by something like this. Try number 1 first. If number one doesn't work try number 2 and if you are still having problems then try number 3 and from there it should work.

1.) Wait for a bit and then Restart Medieval Engineers. (Press: Ctrl + Alt + Delete at the same time and goes to Task Manager. From there click on the "Details" tab and look for "Medieval Engineers" and click on "End Task") and then rejoin the server.

2.) If you join back and are downloading the mods and seeing that the numbers of mods downloaded are going up you are really downloading the mods and wait for them to complete.

3.) Now if it gets stuck on 3/ 25 mods downloaded or stuck on "Updating Mods" on a server and you waited for a few minutes click "Cancel" and exit Medieval Engineers. Reload the game and try to join the server again.

I do hope this guide helps you join servers you where not able to join before. There are some really cool mods for this game that makes it far better then what the base game has to offer. If you have any suggestions do leave a comment below. If a problem still continues do write a comment I will try my best to help you out.

-Thanks again for reading!