If you get this error after updating to the latest version of ark you need to follow the instructions below
Method 1:
Go to your game panel.
Select "Steam Workshop (Installed)"
Click the "Reinstall All" button, this will delete and then install all the latest versions of the mods your server uses.
Method 2:
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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