Argument 1 missing or nil error keeps occuring? {[FIXED!]}

server script :

script.Parent.RemoteEvent.OnServerEvent:Connect(function(Player, Plr)
    while true do
    workspace:FindFirstChild(Plr.Name):FindFirstChild("HumanoidRootPart").CFrame = script.Parent.CFrame * CFrame.fromEulerAnglesXYZ(0,0.1,0.0,0) wait() end
end)

local script :

script.Parent.MouseButton1Down:Connect(function()
    script.Parent.RemoteEvent:FireServer(script.Parent.Parent.TextBox.Text)
end)