Singleplayer Won't Compile

hi, I have been trying to fix this issue for about a week now but just don't have that much experience with c++ yet, my game won't build and the errors seem to stem from **tier1** and **memoverride**, a fix would be much appreciated, I was really hoping to use this in conjunction with [source sdk vs 2022 deferred](https://github.com/54ac/source-sdk-vs2022-deferred).