Need adv dupe help ASAP

On a darkrp server that i play on we are having an issue with our AdvDupe, a few months ago it use to work perfectly then it suddenly broke. i have searched everywhere on the internet to try find a fix but sadly i have found nothing. It will dupe everything BUT props, which is the main use for it. We got an error message once, "[Advanced Duplicator] lua/weapons/gmod_tool/stools/adv_duplicator.lua:527: attempt to index a nil value

  1. AddToGhost - lua/weapons/gmod_tool/stools/adv_duplicator.lua:527
  2. Think - lua/weapons/gmod_tool/stools/adv_duplicator.lua:285
  3. unknown - gamemodes/sandbox/entities/weapons/gmod_tool/shared.lua:197
    "

If anyone has any idea of how to fix it feel free to post :stuck_out_tongue: