Ok, I opened up Garry’s Mod just recently after the three latest updates occured and when I immediately tried to open up my Left 4 Dead models, they all became error except for a few, though it appeared that they were the same models from HL2. And also the GMod Setting interface changed as well which made to show that HL2 Episode 2 is unavailable and showing no Left 4 Dead 1 or 2 content even there. What’s the problem?
Try reinstalling the models.
Using Mount2 again?
Ok, reinstalling worked. Thanks playelite.