Modley

I have fixed what I think was the issue on your server and also adjusted it for everyone.
 
Restarted your server and it should work. If you don't have the mod id 862116109 in your client-side subscribed you shouldn't be able to join.
 
Otherwise you should be able to join and you will see that mod is installed.
PS thx for the card, that was very thoughtful and our team appreciates!

This... so much this.  There's currently no way to verify the server version without doing a full shutdown, update and validate.  It would helpful while troubleshooting with players to be able to quickly show they are on a different version.
 
I would think there's a way for you guys to see the version number during an update, wouldn't you?  Doesn't SteamCMD or something tell you the version it's downloading when you update?  Maybe you could extract that during update and post it on the server status page as "last known version" or something.
 
I imagine as the devs add RCON and more admin controls this will be more accessible.  But whenever it's an option it would be good to have.

Current Version# or Build on the Server Control panel (of owners server, not available version to download)