RemoteEvent firing and received, but the script isn't working?

The RemoteEvent fires and is received as it's prints it, but the PlayerGui parts do not work, as well as the CameraFix cloning into the Player's character.

train = game.ReplicatedStorage.C153
Camera = workspace.CurrentCamera


game.ReplicatedStorage.C153Spawn.OnServerEvent:connect(function(player)
    print("Event Received")
        player.PlayerGui.MainMenuGui.Screen.DriveFrame.Visible = false
        player.PlayerGui.MainMenuGui.Screen.Spawning.Visible = true
        player.PlayerGui.MainMenuGui.Screen.Spawning.Text = "Spawning..."
        wait(0.01)
        local clone = train:Clone()
        clone.Parent = workspace
        clone:MakeJoints()
        clone.Bogies.SD_Bogie:MakeJoints()
        clone.Bogies.SD_Bogie2:MakeJoints()
        wait(1)
        player.Character.HumanoidRootPart.CFrame = CFrame.new(-2449.474, 10.174, -198.335)
        player.PlayerGui.MainMenuGui.Screen.Spawning.Visible = false
        player.PlayerGui.MainMenuGui.Screen.IntroMusic:stop()
  script.Parent.CameraFix:clone().Parent = player.Character
end)

This is what is visible in the developer console: https://gyazo.com/80f97bddbd4561a789993d930de82abb