** (Mix) Could not start application example_server: ExampleServer.Application.start(:normal, []) returned an error: shutdown: failed to start child: {:ranch_embedded_sup, :example_server}
    ** (EXIT) shutdown: failed to start child: :ranch_server_proxy
        ** (EXIT) no process: the process is not alive or there's no process currently associated with the given name, possibly because its application isn't started