While trying to join my own server this is the message i get i am trying to run this server off the same machine that i am playing on and this is my first attempt at it but i keep getting this error -I have the rcmps in the packages folder -I have made the MAS without anything checked on the left side -I have also changed the multiplayer.json file to have autodownload enabled I am pulling my hair out here lol
If you use paid content you probably need to "unlock" the ServerKeys.bin ... https://forum.studio-397.com/index.php?threads/how-to-hosting-with-steamcmd-and-paid-content.57209/
Are you joining with the same client you are running the server from? Not using a separate SteamCMD install? Might be a problem if you are using the same profile for client and server.