You could also be having an issue with your steam installation. If all fails you may have to delete all the mods in your mod file and resubscribe again so it downloads the latest mods we use. The other issue you could be having is not having the Ragnarok, Center or Scorched Earth DLC not installed. This should make steam check for updates. You can do that by going to: Click unsubscribe form all then click subscribe to all after a few seconds. The best solution to get past this issue would be to re subscribe to the mods we use to make sure that everything is up to date. If nothing has come through to your client you could be in a queue to receive the mod update. Commander is actually software you install and run beside ARK:Survival Evolved. V Rainbow Six Siege Path of Exile Warframe Garrys Mod ARK: Survival Evolved Rocket League Paladins. Singleplayer however, does not require a password so Commander will work. Steam may not have ran an update, check your client for updates that are waiting to be installed. Walking Problem Studios updated their cover photo.
To check if it's the server or yourself, ask a friend or check: to see if anyone else is logged in. Either the server hasn't been updated with the latest version of a mod or you are having an issue with your mods on your local system.