Keys not working on TDM cars? plus KEYS ERROR

[lua]
Lua Error: [ERROR] gamemodes/darkrp/entities/weapons/keys/shared.lua:143: attempt to call method ‘canKeysUnlock’ (a nil value) 1. unknown - gamemodes/darkrp/entities/weapons/keys/shared.lua:143
[/lua]

send help sos

[editline]15th November 2014[/editline]

But this error occurs to every player on my server whenever they try to unlock or lock a car door.