Apierophobia type lobby help

I can’t think of a way to get the party owner from the client side to update the UI for the party. I tried using remote events but the output just came as nil. Thanks for the help!

Server Script:

game.Players.PlayerAdded:Connect(function(plr)
	local partycode = Instance.new('StringValue', plr)
	partycode.Name = 'PartyCode'
	local inparty = Instance.new('StringValue', plr)
	inparty.Name = 'InPlayersParty'
	local playernumber = Instance.new('StringValue', plr)
	playernumber.Name = 'PlayerNumber'
end)

game.ReplicatedStorage:WaitForChild('Createparty').OnServerEvent:Connect(function(plr)
	if game.ReplicatedStorage.Parties:FindFirstChild(plr.Name) then end
	local newfolder = Instance.new('Folder', game.ReplicatedStorage.Parties)
	newfolder.Name = plr.Name
	local plr1 = Instance.new('StringValue', newfolder)
	plr1.Name = 'PartyOwner'
	plr1.Value = plr.Name
	plr.	PlayerNumber.Value = '1'
	--plr.InPlayersParty.Value = plr.Name
end)

game.ReplicatedStorage:WaitForChild('Joinparty').OnServerEvent:Connect(function(plr)
	for i,v in pairs(game.Players:GetChildren()) do
		if v.PartyCode.Value == plr.PlayerGui.MainMenu.Frame.LobbyPage.Box1.InputPassword.TextBox.Text then
			local partyownerfolder = game.ReplicatedStorage.Parties:FindFirstChild(v.Name)
			local counter = 0
			for e,f in pairs(partyownerfolder:GetChildren()) do
				counter = counter + 	1
			end
			if counter == 1 then
				local plr2 = Instance.new('StringValue', partyownerfolder)
				plr2.Name = 'Player2'
				plr2.Value = plr.Name
				plr.InPlayersParty.Value = v.Name
				plr.	PlayerNumber.Value = '2'
			elseif counter == 2 then
				local plr3 = Instance.new('StringValue', partyownerfolder)
				plr3.Name = 'Player3'
				plr3.Value = plr.Name
				plr.InPlayersParty.Value = v.Name
				plr.	PlayerNumber.Value = '3'
			elseif counter == 3 then
				local plr4= Instance.new('StringValue', partyownerfolder)
				plr4.Name = 'Player4'
				plr4.Value = plr.Name
				plr.InPlayersParty.Value = v.Name
				plr.	PlayerNumber.Value = '4'
			else
				plr.PlayerGui.MainMenu.Frame.LobbyPage.Box1.InputPassword.TextBox.Text = ''
				plr.PlayerGui.MainMenu.Frame.LobbyPage.Box1.InputPassword.TextBox.PlaceholderText = 'Party is Full!'
			end
		end
	end
end)

Local Script:

local plr = game.Players.LocalPlayer
script.Parent.Create.MouseButton1Click:Connect(function()
--	script.Parent.Box1.Visible = false
	game.ReplicatedStorage.Createparty:FireServer(plr)
	script.Parent.Parent.Parent.BarFrame.Party.PartyName.Text = plr.Name.. "'s Party"
	script.Parent.Parent.Parent.BarFrame.Party.Player1.Image = game.Players:GetUserThumbnailAsync(plr.UserId, Enum.ThumbnailType.HeadShot, Enum.ThumbnailSize.Size100x100)
	script.Parent.Parent.Parent.BarFrame.Party.Player1.Player1Name.Text = plr.Name
	
end)

script.Parent.InputCodeBox.TextBox.FocusLost:Connect(function()
	if game.ReplicatedStorage.Parties:FindFirstChild(plr.Name) then 
		plr.PartyCode.Value = script.Parent.InputCodeBox.TextBox.Text
	else
		script.Parent.InputCodeBox.TextBox.Text =''
		script.Parent.InputCodeBox.TextBox.PlaceholderText = 'Create A Party First!'
		wait(2)
		script.Parent.InputCodeBox.TextBox.PlaceholderText = ''
		script.Parent.Parent.Parent.BarFrame.Party.RoomCode.Text = plr.PartyCode.Value
	end
end)

script.Parent.Box1.Confirm.MouseButton1Click:Connect(function()
	if script.Parent.Box1.InputPassword.TextBox.Text ~= '' then
		for i,v in pairs(game.Players:GetChildren()) do
			if v.PartyCode.Value == script.Parent.Box1.InputPassword.TextBox.Text then
				game.ReplicatedStorage.Joinparty:FireServer(plr)
				script.Parent.Box1.InputPassword.TextBox.Text = ''
				script.Parent.Box1.InputPassword.TextBox.PlaceholderText = 'Joining Party'
				
			else
				script.Parent.Box1.InputPassword.TextBox.Text = ''
				script.Parent.Box1.InputPassword.TextBox.PlaceholderText = 'Party Code Is Incorrect'
			end
		end
	else
		script.Parent.Box1.InputPassword.TextBox.Text = ''
		script.Parent.Box1.InputPassword.TextBox.PlaceholderText = 'Enter A Party Code!'
	end
end)