Please try the following:
- Unsubscribe from the latest mod that updated (e.g. Structures Plus)
- Make note of the mod ID (e.g. Structures Plus is 731604991)
- Browse to the folder where Ark is installed and navigate down to this path: <SteamPath>\ARK\ShooterGame\Content\Mods\
- Delete the folder that matches the mod ID (e.g. 731604991)
- Delete the mod file that matches the mod ID (e.g. 731604991.mod)
- Resubscribe to the mod, let it install and re-connect to the server.