MouseButton1Up/Click Event is not firing?

I got a problem where my MouseButton1Up Event is not firing. I tried anything and I am not sure why is it not firing.

My code in Local Script children of my Image Button:

local player1Frame = script.Parent.Parent.Player1Offer
local AcceptTrade = game:GetService("ReplicatedStorage").Functions.AcceptedTradeRequest

script.Parent.MouseButton1Up:Connect(function()
	print("CLICKED NOOB!") -- debugging purposes
	local givenPets = {}
	for i, v in pairs(player1Frame.Offer:GetChildren()) do
		if v:IsA("ImageLabel") then
			table.insert(givenPets, v.Name)
		end
	end
	table.foreach(givenPets, print) -- for debugging purposes
	local result = AcceptTrade:InvokeServer(givenPets)
end)

It happened to me once, try to use mousebutton1down dunno if it will work