wtf is this message

i was just playing gmod and was messing with some old fnaf npcs when this message popped up. i'm on a single player server btw

https://preview.redd.it/wq6px8ediw5g1.png?width=721&format=png&auto=webp&s=c91ec9537c4e5bddb8c15cc53fc35a7223a07787