DarkRP Server Crash

Alright, I was watching my log with 20 people on my server, next thing I know I get…


19:02:40 Lua Error: [@gamemodes\darkrp\entities\entities\spawned_shipment\init.lua:102] Tried to use a NULL entity!
19:02:41 Lua Error: [@gamemodes\darkrp\entities\entities\chatindicator\init.lua:41] Tried to use a NULL entity!
19:02:41 Lua Error: ERROR: GAMEMODE:'PlayerSay' Failed: [@gamemodes\darkrp\gamemode\main.lua:968] Tried to use a NULL entity!
19:02:41 Lua Error: [cpp] Error: hook->PlayerSay returned a non-string!
19:02:41 Lua Error: [@lua\includes\modules\constraint.lua:442] Tried to use a NULL entity!
19:02:42 Lua Error: [@gamemodes\darkrp\entities\entities\chatindicator\init.lua:41] Tried to use a NULL entity!
19:02:42 Lua Error: [@lua\includes\modules\constraint.lua:442] Tried to use a NULL entity!
19:02:42 Lua Error: [@lua\includes\modules\constraint.lua:442] Tried to use a NULL entity!

Does anyone know how to prevent this?