Garry's Mod Won't Load

When ever I go to launch gmod, it loads a black screen and then immediately closes. As far as I know, I have dirextc9 version 40 installed (which is known if not installed to cause gmod not to load) and all my drivers are up-to-date and I do also have directx 12 installed if that is what is causing this. I have verified the cache integrity and reinstalled many times