Attempt to call a nil value error

[night kayak]

When I playtest and do button.MouseButtonClick:Connect(Function().
Output says ServerScriptService.Main:11: attempt to call a nil value - Client - LocalScript:12
What do i do?

[half flicker]

I'm relatively new to scripting but I think it should be local rolledNumber = game.ReplicatedStorage.Remotes.RollFunction:InvokeServer()

[vague wagon]

** You are now Level 1! **

[night kayak]

still doesnt work

Main and LocalScript attempt to call a nil value error