Attempt to index nil with "Name"

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#1

Hello! I am working on a murder mystery game. When the game start, the murder will stop moving for 10 seconds, but the output just said, Attempt to index nil with "name"
–This is is the script (Module Script). Error at line 2

local function MurderSetIdle(player)
	if player.Name == ServerStorage.Players.Murderer.Value then
		local MurderChar = player.Character or player.CharacterAdded:Wait()
		local MurderHumanoid = MurderChar:FindFirstChild("Humanoid")
		
		MurderHumanoid.WalkSpeed = 0
		MurderHumanoid.JumpHeight = 0
		task.wait(10)
		MurderHumanoid.WalkSpeed = 16
		MurderHumanoid.JumpHeight = 7.2		
	end
end

–This is where I call the function

local function preparePlayer(player, whichSpawn)
	--if player.Name == ServerStorage.Players.Murderer.Value then
	--	player.RespawnLocation = spawnLocations.MurderSpawnModel.MurderSpawn
	--	player:LoadCharacter()
	--else
	--	player.RespawnLocation = whichSpawn
	--	player:LoadCharacter()
	--end

	player.RespawnLocation = whichSpawn
	player:LoadCharacter()
	
	startSound:Play()
	
	task.spawn(MurderSetIdle, player)

	
	local character = player.Character or player.CharacterAdded:Wait()
	-- Give the player a tool 
	if player.Name == ServerStorage.Players.Murderer.Value then --murderer's knife
		local knife = playerWeapons:WaitForChild("Knife"):Clone()
		knife.Parent = player.Backpack
	elseif player.Name == ServerStorage.Players.Sheriff.Value then --sheriff's gun
		playerWeapons:WaitForChild("Gun").Bullets.Value = 8
		local gun = playerWeapons:WaitForChild("Gun"):Clone()
		gun.Parent = player.Backpack
	elseif player.Name == ServerStorage.Players.Healer.Value then --healer's staff
		local staff = playerWeapons:WaitForChild("Staff"):Clone()
		staff.Parent = player.Backpack
	end
end

By using print() and breakpoints, I knew that the function worked, but the error stop it. I’m pretty bad at explain, but I hope you understand, pls help!
Thanks in advance!

#2

Have you printed player? The error means that player is nil.

#3

you mean did I defined the player?

#4

ok, i just printed the (player.Name) and it worked.

#5

Do if player then as I showed here:

local function MurderSetIdle(player)
	if player and player.Name == ServerStorage.Players.Murderer.Value then
		local MurderChar = player.Character or player.CharacterAdded:Wait()
		local MurderHumanoid = MurderChar:FindFirstChild("Humanoid")
		
		MurderHumanoid.WalkSpeed = 0
		MurderHumanoid.JumpHeight = 0
		task.wait(10)
		MurderHumanoid.WalkSpeed = 16
		MurderHumanoid.JumpHeight = 7.2		
	end
end
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