OnClientInvoke returns nil and does not yield at all

[weakroblox35]

I’m trying to create a 1v1 system utilizing RemteFunctions as a way to communicate if the player being invited has declined or accepted, however, upon invoking, it does yield and returns nil.

local Response = ReplicatedStorage.Assets.Events.Invite:InvokeClient(Invitee, Player.Name:upper())
print(Response)
--
Important.Services.ReplicatedStorage.Assets.Events.Invite.OnClientInvoke = function(Player:string?)
	print(Player)
	local UI = Important.Services.ReplicatedStorage.Assets.Frame:Clone()
	UI.TextLabel.Text = "["..Player.."] WANTS TO BATTLE!"
	UI.Name = "holder"
	UI.Parent = Important.Services.Players.LocalPlayer.PlayerGui.MainUI
	Important.Services.TweenSerice:Create(UI, TweenInfo.new(0.5, Enum.EasingStyle.Back, Enum.EasingDirection.InOut), {Position = UDim2.new(0.305, 0,0.778, 0)}):Play()
	UI.Accept.MouseButton1Down:Once(function()
		Important.Services.TweenSerice:Create(UI, TweenInfo.new(0.5, Enum.EasingStyle.Back, Enum.EasingDirection.InOut), {Position = UDim2.new(0.305, 0,1, 0)}):Play()
		task.delay(0.5,function()
			UI:Destroy()
			UI = nil
		end)
		return true
	end)
end)

The UI is created but it returns nil and immediately.

[DiamondRoPlayz]

You forgot to wait until button gets clicked.

local Response = ReplicatedStorage.Assets.Events.Invite:InvokeClient(Invitee, Player.Name:upper())
print(Response)
--
Important.Services.ReplicatedStorage.Assets.Events.Invite.OnClientInvoke = function(Player:string?)
	print(Player)
	local UI = Important.Services.ReplicatedStorage.Assets.Frame:Clone()
	UI.TextLabel.Text = "["..Player.."] WANTS TO BATTLE!"
	UI.Name = "holder"
	UI.Parent = Important.Services.Players.LocalPlayer.PlayerGui.MainUI
	Important.Services.TweenSerice:Create(UI, TweenInfo.new(0.5, Enum.EasingStyle.Back, Enum.EasingDirection.InOut), {Position = UDim2.new(0.305, 0,0.778, 0)}):Play()

	local buttonClicked = false; -- buttonClicked local variable

	UI.Accept.MouseButton1Down:Once(function()
		Important.Services.TweenSerice:Create(UI, TweenInfo.new(0.5, Enum.EasingStyle.Back, Enum.EasingDirection.InOut), {Position = UDim2.new(0.305, 0,1, 0)}):Play()
		task.delay(0.5,function()
			UI:Destroy()
			UI = nil
		end)
		--return true

		buttonClicked = true; set variable that button is clicked.

	end)

	repeat task.wait()until buttonClicked; -- wait for button to be clicked
	return true;
end)

[weakroblox35]

Seems like that fixed it, but why? I thought remote functions hang forever until something is returned?

[DiamondRoPlayz]

yeah I know but you returned nothing.