Literally shooting errors

So I don’t know what has happened, but for some reason today when I got onto gmod and spawned in a vindictus boss to see what kind of ways I could kill the things, I started shooting with a gun, only to be surprised by the fact that I was shooting errors. So, I tried a different gun and still, same thing. Now, it is happening to all of the guns that don’t use a custom bullet/projectile. I have even completely disabled all addons and it is still doing it with the basic guns.

any idea what is causing it and how?

Thanks in advance