Compiled project in Unity won't run?

Question

Unity

I sketched a simple project with two scenes - a menu and a submenu. Just one simple script that, when you click on the first menu button, loads the second menu.

public void ShowGameModeMenu()
{
     SceneManager.LoadScene("Game mode menu");
}

When you click on Play, everything works, there are no errors. But when you try to run an executable exe file from the explorer, as well as when you try to execute Build and Run, nothing happens. No errors, but no window either.
Windows 10 OS, building the project for the desktop, changing the architecture in the Build Settings from x86 to x86_64 did not work.

Answer 1

Build SettingsBoth scenes must be included in the project .