It does look strange that it didn't work.
I have almost the same with the only different that I use the ::class version in schedule:

    /**
     * Define the application's command schedule.
     *
     * @param  \Illuminate\Console\Scheduling\Schedule $schedule
     * @return void
     */
    protected function schedule(Schedule $schedule)
    {
        $schedule->command(\App\ConsoleCommands\HelpCenter::class)->everyMinute();
    }

I'm not sure if it result in more information but did you try to run it with -vvv (verbose) for more information?

Yes even now, the fact is that even if I put this:

$Schedule-> command ('vbfdsvdsvds') -> everyminute ();

he always tells me:

No scheduled commands are ready to run

not even error returns 😢