torso is not a valid member of Model??

I'm trying to add a script I made quite some time ago into the starterpack so that people spawn and the script loads. It is a grapple hook script, and I honestly have no idea why it isn't working. The top of the script is this:

plr = script.Parent.Parent
Char = plr.Character
mouse = plr:GetMouse()
tor = Char.Torso
larm = Char['Left Arm']
rarm = Char['Right Arm']
swagyolo = false

So when I test it's fine, but when I publish and play the game it comes up with "Torso is not a valid member of Model" plez help?

It can't just be player, it has to be localplayer so it pertains to anyone, not just the one in studio. (i think im not rlly a wizz)