Attempt to index nil with "wait for child"

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#1

Keep getting an error for this script:

I marked the error area. The error is: Attempt to index nil with “wait for child”

whats wrong?

local Character
local Player

local Tool = script.Parent

local ReplicatedStorage = game:GetService("ReplicatedStorage")
local Event = ReplicatedStorage.Stabbed

local Animation = script.Parent.Stab
local StabTrack

local Cooldown = false
local CoolDownTime = 1

Tool.Equipped:Connect(function()
	Character = Tool.Parent 
	Player = game:GetService("Players"):GetPlayerFromCharacter(Character)

	local Humanoid = Character:FindFirstChild("Humanoid")

	if Humanoid then
		StabTrack = Humanoid:LoadAnimation(Animation)
	end
end)

local attacking = false

Tool.Activated:Connect(function()
	if Cooldown == false then
		Cooldown = true
		StabTrack:Play()
		attacking = true
		wait(CoolDownTime)
		Cooldown = false
        attacking = false
	end
end)

Tool.EnhancedCone.Touched:Connect(function(Hit)
if attacking then
	if Hit.Parent then
		if Hit.Parent:FindFirstChild("Humanoid") then
			local Humanoid = Hit.Parent:FindFirstChild("Humanoid")
			local plr = game:GetService("Players")	:GetPlayerFromCharacter(Hit.Parent)
				local vampire = plr:WaitForChild("Classes"):WaitForChild("Vampire")   -- RIGHT HERE <---------
				
				if vampire.Value == true then
					Humanoid.Health -= 100
				else
				Humanoid.Health -= 1
				end	
			end
		end
	end
end)
#2

Make sure that Classes and Vampire actually exist inside of plr. Attempt to index nil with wait for child just means that it can’t find the instance.

#3

It defiantly exists, might be a spelling error on my part then, gtg now put will check later and keep you posted.

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#4

I was testing the weapon on rigs, and they dont have a player so thats why it did not work.

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