Garry's mod Weapon switching error.

Hello! For some reason after the latest update of Garry’s mod any time I pick up a weapon in TTT, DarkRP, Sandbox, essentially every gamemode I get the following LUA error:

terrortown\gamemode\cl_wepswitch.lua:101 attempt to call method ‘ammo1’ (a nil value)(hook: HUDpaint)

I’ve already tried deleting my addons, clearing cache, even completely uninstalling / reinstalling gmod from my computer with no luck.

I’ve scoured the interwebs with all of my might and I cannot find a solution. Any help at all would be much appreciated!
Thanks in advance.