Errors in sandbox

Its nothing big but I’ve suddenly been getting errors when I do things.
They are:

When I open up the Q menu,
ERROR: GAMEMODE:‘OnSpawnMenuOpen’ Failed: sandbox\gamemode\spawnmenu/spawnmenu.lua:66: attempt to call field ‘SpawnMenuOpen’ (a nil value)

When I Spawn props,
:1: attempt to call field ‘SpawnedProp’ (a nil value)

and sometimes when I try to undo stuff I’ll get this error, and can’t deleat them.
includes/modules/undo.lua:358: attempt to call field ‘?’ (a nil value)

all except the last one are just an anoyance, and the last one disrupts my ability to work effectivly, I have Redone garrysmod, and tryed deleting my gamemode folder, but it still dosn’t fix it.

If anyone could Help I would appriciate it.