Npcs Screwed up

well my Combines are rly Fed up because i downloaded some addon and somehow my npcs from hlf 2 is rly screwd up like Alyx and Barney are some not shooting or moving at all combine look like the body are twisted and couldnt shoot or anything so i tryed to fix it but i have no axsess to do it so plz could u help me?

Clean GMod.