Hi, such connection errors are very common. The reason for this is mostly: 1. Different game versions = The server must run on the same version as your game, 2. Mod error = There are always mods that load servers and make sure that it does not sound properly. Look if you need a mod update, that could be because of that. A tip from me try if one of your friends can join, then you will find error whether it is due to a mod or a wrong game version. If it still doesn't work, please contact Nitrado Support immediately. I hope I was able to help you.