Alot of bugs

Im having alot of bugs for a long time now.

(a nil value) i get this with alot of addons. (From garrysmod.org)

Second problem.
When i download a dupe it spawns unwelded and stuff…

I tried redownloading it. (Different locations)

How do i fix this?

Remove mad cows weapons.

Isnt there a fix for it?

maybe there is a fix garrysmod.org maybe.

(i hope not because madcows base is overused)