PlayerAdded event not working?

I have a code here which adds a player to my custom made playerlist here.

The PlayerAdded event in this local script does not work, I get no error, nor a print which is part of the code.

game.Players.PlayerAdded:Connect(function(plr)
	wait(0.1)
	print(plr.Name)
	local playername = plr.Name
	script.Parent.PlayerTemplate:Clone().Parent = script.Parent.Background
	local frame = script.Parent.Background:WaitForChild("PlayerTemplate")
	wait()
	frame.Name = playername
	frame.Visible = true
	frame.Name = (plr.Name)
	frame.PlayerName.PlayerName.Text = playername
	frame.Rank.Rank.Text = playerfolder[plr.Name].Rank.Value
	game.Workspace.Players[plr.Name].Team.Changed:connect(function()
		local pf = game.Workspace.Players[plr.Name]
		print(pf.Team.Value)
		if pf.Team.Value == game.Teams.Sierra.Name then
			print(plr.Name.." updating leaderboards so this player is in team Sierra")
			print(script.Parent.Background[plr.Name].BackgroundColor3)
			script.Parent.Background[plr.Name].BackgroundColor3 = Color3.new(0, 170, 255)
		elseif pf.Team.Value == game.Teams.Tango.Name then
			print(script.Parent.Background[plr.Name].BackgroundColor3)
			script.Parent.Background[plr.Name].BackgroundColor3 = Color3.new(170, 0, 0)
			print(plr.Name.." updating leaderboards so this player is in team Tango")
		else
			print(script.Parent.Background[plr.Name].BackgroundColor3)
			print(plr.Name.." updating leaderboards so this player is not in team Tango or Sierra")
			script.Parent.Background[plr.Name].BackgroundColor3 = Color3.new(0,0,0)
		end
	end)
	if plr:IsInGroup(4023191) then
		frame.Capbadge.ImageLabel.Image = ("rbxassetid://1567461093")
	elseif plr:IsInGroup(1197643) then
		frame.Capbadge.ImageLabel.Image = ("rbxassetid://117739276")
	elseif plr:IsInGroup(1197645) then
		frame.Capbadge.ImageLabel.Image = ("rbxassetid://239367802")
	elseif plr:IsInGroup(4030193) then
		frame.Capbadge.ImageLabel.Image = ("rbxassetid://756770459")
	elseif plr:IsInGroup(4023094) then
		frame.Capbadge.ImageLabel.Image = ("rbxassetid://193965796")
	elseif plr:IsInGroup(3773876) then
		frame.Capbadge.ImageLabel.Image = ("rbxassetid://702638350")
	end
end)

###This is happening because PlayerAdded is server-side only (it's only useful on the server side), and the player joins before the script runs, and when it does, it waits for the NEXT player to join, and it would run code on them. A fix to your script would be to use LocalPlayer instead.

local plr = game:GetService("Players").LocalPlayer
    wait(0.1)
    print(plr.Name)
    local playername = plr.Name
    script.Parent.PlayerTemplate:Clone().Parent = script.Parent.Background
    local frame = script.Parent.Background:WaitForChild("PlayerTemplate")
    wait()
    frame.Name = playername
    frame.Visible = true
    frame.Name = playername
    frame.PlayerName.PlayerName.Text = playername
    frame.Rank.Rank.Text = playerfolder[plr.Name].Rank.Value
   gam.Workspace.Players[plr.Name].Changed:Connect(function()
        local pf = game.Workspace.Players[plr.Name]
        print(pf.Team.Value)
        if pf.Team.Value == game.Teams.Sierra.Name then
            print(plr.Name.." updating leaderboards so this player is in team Sierra")
            print(script.Parent.Background[plr.Name].BackgroundColor3)
            script.Parent.Background[plr.Name].BackgroundColor3 = Color3.new(0, 170/255, 255/255)
        elseif pf.Team.Value == game.Teams.Tango.Name then
            print(script.Parent.Background[plr.Name].BackgroundColor3)
            script.Parent.Background[plr.Name].BackgroundColor3 = Color3.new(170/255, 0, 0)
            print(plr.Name.." updating leaderboards so this player is in team Tango")
        else
            print(script.Parent.Background[plr.Name].BackgroundColor3)
            print(plr.Name.." updating leaderboards so this player is not in team Tango or Sierra")
            script.Parent.Background[plr.Name].BackgroundColor3 = Color3.new(0,0,0)
        end
    end)
    if plr:IsInGroup(4023191) then
        frame.Capbadge.ImageLabel.Image = "rbxassetid://1567461093"
    elseif plr:IsInGroup(1197643) then
        frame.Capbadge.ImageLabel.Image = "rbxassetid://117739276"
    elseif plr:IsInGroup(1197645) then
        frame.Capbadge.ImageLabel.Image = "rbxassetid://239367802"
    elseif plr:IsInGroup(4030193) then
        frame.Capbadge.ImageLabel.Image = "rbxassetid://756770459"
    elseif plr:IsInGroup(4023094) then
        frame.Capbadge.ImageLabel.Image = "rbxassetid://193965796"
    elseif plr:IsInGroup(3773876) then
        frame.Capbadge.ImageLabel.Image = "rbxassetid://702638350"
    end