CS:GO FIX FOR OTC3 (OCTOBER 16, 2020 UPDATE) Its just an old version of the game.
Download it and extract it in your CS:GO Folder.
After that, you can inject it with no issue.
Have fun.
Download here: https://github.com/ItsCEED/CS-GO-FIX-FOR-OTC3-OCTOBER-16-2020-UPDATE-/releases/tag/v1.0