Remote Event not working with PlayerGui??

game:GetService("ReplicatedStorage").RemoteEvent.OnServerEvent:Connect(function(plr)
	local newgui = plr.PlayerGui.WaterMenu.Frame.Z
	newgui.Text = "---"
end)

I made this remote event to do this to a player Gui and for some reason it only works if I keep it in starterGui and it won't work if I click a text button to insert the WaterMenu into the PlayerGui.

A server script cannot access PlayerGui due to Filtering Enabled. If you want to access something on the Client after something happens on the Client, you can use a BindableEvent. A RemoteEvent is only going to let you cross over from Server to Client and vice versa.

Bindable Events: https://developer.roblox.com/en-us/api-reference/class/BindableEvent