It works in studio but not in roblox?

Read over this blog post: https://scriptinghelpers.org/blog/it-works-in-studio-but-not-online

It could very well be you're not waiting for the player''s character to load..

The line added on top of your code waits for the player's character to load before being indexed in any code below.

repeat wait() until game.Players.LocalPlayer.Character
script.Parent.AwayC.MouseButton1Click:connect(function()
    game.Workspace.CurrentCamera.CameraSubject = game.Workspace.Cam1
    game.Workspace.CurrentCamera.CameraType = "Track"
end)

script.Parent.HomeC.MouseButton1Click:connect(function()
    game.Workspace.CurrentCamera.CameraSubject = game.Workspace.Cam2
    game.Workspace.CurrentCamera.CameraType = "Track"
end)

script.Parent.Person.MouseButton1Click:connect(function()
    game.Workspace.CurrentCamera.CameraSubject = game.Players.LocalPlayer.Character.Humanoid
    game.Workspace.CurrentCamera.CameraType = "Custom"
end)