If you get this error after updating to the latest version of ark you need to follow the instructions below
Update your mods
Follow steps 2 & 3 here http://pingperfect.com/phpbb/viewtopic.php?f=81&t=755 then uninstall/reinstall the mod
If Method 1 has not worked it usually means that one or more of your mods are now incompatible with the latest ark version. To resolve this remove mods 1 by 1 from your config file until you are able to join (Take a backup of your world first) Once you can join put back all the mod numbers except the last one you removed.
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