`` local ScreenGui = script.Parent local ShopFrame = ScreenGui.ShopFrame local OpenShop = ScreenGui.OpenShop
OpenShop.MouseButton1up:Connect(function() ShopFrame.Visible = not ShopFrame.Visible end)``
The Error
MouseButton1up is not a valid member of ImageButton "Players.JumpingConclusions.PlayerGui.Gui #4.OpenShop"
You're supposed to write "MouseButton1Up" not "MouseButton1up". Small difference, big change
The syntax is very picky on the way you spell. Everything needs to be character perfect. In this case, MouseButton1up should have an uppercase U in up.