PlayerAdded Not working How Do I Fix This?This Should Detect players When They Join

Hey There!Im Sorry If Im getting Too Many Errors Lately But Im Just New So When The Script Gets 2 The Line Of script Containing My "PlayerAdded" Script The Whole script Stops Like When I play The Game And I Press The Button Nothing Works Tried Even printing After The PlayerAdded Here Is The Portion Of The Code: (keep In mind I Dont Have Any Variables Cointaning "Plr" So Yea)

--Variables--
	local Players = game:GetService("Players")
local button = script.Parent-- gets the button
	print("VariablesDone!")--prints "VariablesDone!"
	--MainScript--
	Players.PlayerAdded:Connect(function(plr)
    print("playerJoined")
	button.MouseButton1Click:Connect(function()--when a player presses the button in left click
        script.Parent.Parent.Visible = false
        print("Pressed")-- when a player presses the button then it will print out "Pressed"
    end)
end)

Maybe have a server script that checks when a player is added and it fires a remote event to the client telling it that a player joined

Put this in a LocalScript.

local Button = script.Parent -- Gets the button
Button.MouseButton1Click:Connect(function() -- When a player presses the button in left click
	Button.Parent.Visible = false
	print("Pressed") -- when a player presses the button then it will print out "Pressed"
end)