Lua error need help solving!>

So i noticed randomly that people would crash from my server. i looked in console.lua and it seems that a lua code is being spammed in there.
Maybe this is why. I am not getting any script errors in game console nor is anyone else.

Can anyone help me with this! it says Nill value and the line it is on says if owner:isCP()

ERROR] addons/money printers/lua/entities/money_printer6/init.lua:257: attempt to call method ‘isCP’ (a nil value)

  1. unknown - addons/money printers/lua/entities/money_printer6/init.lua:257

What would i do to fix this?

Thanks in advance,
Richard

Are you using DarkRP, if so which version?

2.5