CS:GO Manual injector help

Hey,well i took a manual map c# source injector and i made a simple ui,but when i try to inject it i got this error,does anyone how to fix this?
image https: //imgur .com/a/I5ZVU

Get a better manual map source

-Fluffin

I can teach you how to make your own manual map injector! Just let me know if you are interested!

And I tell you some secret stuff!