Whenever I try to join any game, It says authentication failed. Is there any way to fix this? It sucks not being able to play games.

dont be a noob

download node-hill it should be good here is the link
https://www.brick-hill.com/client/

Thanks for the help! I do have the client installed though, This only is a issue when joining my own game.

(Oh and, if this helps, I am using a batch launcher. Specifically launch-client.bat from the node-server template.)