Dont know why this happens? DETAILED

I need to award points appropriately. I did this by checking their torso material. Well, Roblox has been giving me an error (Explorer: http://imgur.com/ne1oerR). I suspected the line of code was line 38 as I probed the code. (Script: https://kobra.io/#/e/-KEH8mW3w9bv9hy-lL-u) I would appreciate an answer. I am so close to finishing my game!!!

Code:

function timer(timecountdown)
    local timerValue = timecountdown
while timerValue ~= 0 do
    wait(1)
    timerValue = timerValue - 1
    for i, v in   pairs(game.Players:GetChildren()) do
        v.PlayerGui.ScreenGui.TextLabel.Text = timerValue
    end
end
end

function timerhide(timecountdownhide)
    local timerValuehide = timecountdownhide
while timerValuehide ~= 0 do
    wait(1)
    timerValuehide = timerValuehide - 1
    for i, v in pairs(game.Players:GetChildren()) do
        v.PlayerGui.ScreenGui.TextLabel.Text = "Time Left To Hide: " .. timerValuehide
    end
end
end

function timeri(timei)
    local timerValuei = timei
while timerValuei ~= 0 do
    wait(1)
    timerValuei = timerValuei - 1
    for i, v in pairs(game.Players:GetChildren()) do
        v.PlayerGui:WaitForChild("ScreenGui")
            v.PlayerGui.ScreenGui.TextLabel.Text = "Intermission: " .. timerValuei
    end
end

end

while true do 
    print("23")
    for i, v in   pairs(game.Players:GetChildren()) do
        if v.Character.Torso.Material == Enum.Material.Plastic then
            game.Workspace.Jackel.SurfaceGui.TextLabel.Text = v.Name .. ", "
            v.leaderstats.sCoins.Value = v.leaderstats.sCoins.Value + 200
        end
        v:LoadCharacter()
    end

        timeri(10)  

    for i, v in  pairs(game.Players:GetChildren()) do
            v.PlayerGui.ScreenGui.TextLabel.Text = "Teleporting Players..."
    end



for i, v in   pairs(game.Players:GetChildren()) do  v.Character.Torso.CFrame = CFrame.new(Vector3.new(-126.7, 41.61, -141.1)) -- Change numbers to whatever 
wait(1)
v.PlayerGui.ScreenGui.TextLabel.Text = ""
wait(1)

end


timerhide(20)
for i, v in pairs(game.Players:GetChildren()) do 
v.PlayerGui.ScreenGui.TextLabel.Text = "The Illness Has Been Let Out!"
end

wait(1)
local iCopy = game.ServerStorage.DFDIllness:Clone()
iCopy.Parent = game.Workspace
iCopy:MakeJoints()
timer(90)

for i, v in pairs(game.Players:GetChildren()) do
v.PlayerGui.ScreenGui.TextLabel.Text = "Game Ended"

end
wait(1)
for i, v in pairs(game.Players:GetChildren()) do
    v.PlayerGui.ScreenGui.TextLabel.Text = "Teleporting Players Back..."
end
wait(1)




for i, v in   pairs(game.Players:GetChildren()) do  v.Character.Torso.CFrame = CFrame.new(Vector3.new(13.06, 68.92, -2.18)) -- Change numbers to whatever   
v.PlayerGui.ScreenGui.TextLabel.Text = ""

end


game.Workspace.DFDIllness:Destroy()

end