So we encountered a few issues with our server, however we discovered that at least one person was able to get in the server just fine. So ill share with you what we discovered. First, ill start with what the person did to successfully get on.
They deleted the mods folder on their darkness falls install. Unzipped the latest version of darkness falls to their destop, and copied over the folders one by one, overwriting as necessary, rather than extracting directly to the directory like the rest of us had.
Those of us that were getting an error found it best to completely uninstall 7 days, delete the entire directory, then reinstall, and then reinstall the 19.1 7days. However, we discovered that if someone connected with the config that caused them to error out in any way, it was somehow corrupting their entry on the server too. i had the players in question send me their steam64id, then i deleted their files (resets progress of course) and cleared their entry in player.xml. When i did THAT step, and the step with the complete clean install, we were able to resolve the error messages everyone was getting.
Just for emphasis. IF YOU CONNECT TO A SERVER AND GET THIS ERROR YOUR PLAYER DATA WILL BE CORRUPT AND YOU WONT BE ABLE TO GET BACK IN UNLESS AN ADMIN HAS YOUR STEAM64 ID AND CLEARS IT FROM THE SERVER
I hope that helps, i help run a relatively small server and everyone loves this mod so we took the time to troubleshoot this for everyone til we figured out the right series of steps to get this working for all our guys.