It isn't necessary since that plugin's purpose was implemented into CS:GO
https://blog.counter-strike.net/inde...2020/05/30002/
It would be more likely what BeepIsla mentioned, that something is modifying it.
You could use the plugin if you are using the custom game mode and for some reason it isn't supported in that, but there should be no other reason it isn't working unless it's being modified. There are of course instances were it won't work even though clearly it should, but that's just on CS:GO bugs.