There are no commands defined in the "update" namespace.

Hi, my console script is giving me an error that says:

There are no commands defined in the "update" namespace. {"exception":"[object] (Symfony\Component\Console\Exception\NamespaceNotFoundException(code: 0): There are no commands defined in the \"update\" namespace. at /var/www/faketube_cz/FakeTube/vendor/symfony/console/Application.php:669)
[stacktrace]
#0 /var/www/faketube_cz/FakeTube/vendor/symfony/console/Application.php(720): Symfony\Component\Console\Application->findNamespace()
#1 /var/www/faketube_cz/FakeTube/vendor/symfony/console/Application.php(266): Symfony\Component\Console\Application->find()
#2 /var/www/faketube_cz/FakeTube/vendor/symfony/console/Application.php(175): Symfony\Component\Console\Application->doRun()
#3 /var/www/faketube_cz/FakeTube/vendor/laravel/framework/src/Illuminate/Foundation/Console/Kernel.php(201): Symfony\Component\Console\Application->run()
#4 /var/www/faketube_cz/FakeTube/artisan(35): Illuminate\Foundation\Console\Kernel->handle()
#5 {main}
"}

There is my code (text is in Czech):

<?php

namespace App\Console\Commands;

use App\Models\Video;

use Illuminate\Console\Command;
use Illuminate\Support\Facades\Storage;
use ProtoneMedia\LaravelFFMpeg\Exporters\HLSExporter;
use Illuminate\Support\Facades\Log;

use FFMpeg\Filters\Video\PadFilter;
use FFMpeg\Coordinate\Dimension;

use function League\Flysystem\Local\filesize;

class ZpracujVideo extends Command
{
    /**
     * The name and signature of the console command.
     *
     * @var string
     */
    protected $signature = 'app:zpracuj-video';

    /**
     * The console command description.
     *
     * @var string
     */
    protected $description = 'Zpracuje čekající videa';

    /**
     * Execute the console command.
     */
    public function handle()
    {
        try {
            Log::info('Příkaz zpracování videa byl spuštěn.');

            $ffmpeg = \FFMpeg\FFMpeg::create(array(
                'ffmpeg.binaries'  => '/usr/bin/ffmpeg',
                'ffprobe.binaries' => '/usr/bin/ffprobe',
                'timeout'          => 3600, // The timeout for the underlying process
                'ffmpeg.threads'   => 12,   // The number of threads that FFMpeg should use
            ));

            $ffprobe = \FFMpeg\FFProbe::create();

            // Zde načtěte videa, která mají stav_zpracovani "in_queue"
            $videos = Video::where('stav_zpracovani', 'in_queue')->get();

            if (!$videos->isEmpty()) {
                foreach ($videos as $video) {

                    Log::info('Zpracovávám video ' . $video->nazev);

                    if (!is_dir(storage_path('app/public/videos/' . $video->video_id))) {
                        mkdir(storage_path('app/public/videos/' . $video->video_id), 0777, true);
                    }

                    $filePath = storage_path('app/public/videos/') . $video->nazev_souboru;

                    Log::info("Cesta ke zpracovávanému souboru: " . $filePath);

                    $media = $ffmpeg->open($filePath);

                    $duration = $ffprobe->format($filePath)->get('duration');
                    $durationFormatted = gmdate('i:s', $duration);
                    $dimensions = $ffprobe->streams($filePath)->videos()->first()->getDimensions();
                    $width = $dimensions->getWidth();
                    $height = $dimensions->getHeight();
                    $container = $ffprobe->streams($filePath)->videos()->first()->get('format_name');
                    $bitrate =  $ffprobe->streams($filePath)->videos()->first()->get('bit_rate');

                    $format = new \FFMpeg\Format\Video\X264('aac', 'libx264');
                    $format->setKiloBitrate(1000);

                    // Upravit náhledový snímek pro video na výšku s černým okolím
                    if ($height > $width) {
                        $padFilter = new PadFilter(
                            new Dimension($width, $height),
                            null,
                            null,
                            null,
                            '#000000'
                        );

                        $media->addFilter($padFilter);
                    }

                    // Vytvoření náhledového snímku v rozlišení 1280x720
                    $frameMaxRes = $media->frame(\FFMpeg\Coordinate\TimeCode::fromSeconds(1));
                    $frameMaxRes->save(storage_path('app/public/videos/' . $video->video_id) . '/maxresdefault.jpg');

                    // uložení videa
                    $media->save($format, storage_path('app/public/videos/' . $video->video_id) . '/index.mp4');

                    $video->container = mime_content_type($filePath);
                    $video->velikost_souboru = Storage::size('public\videos\' . $video->nazev_souboru);
                    $video->delka_ms = $duration * 1000;
                    $video->bitrate_bps = $bitrate;
                    $video->chyby_zpracovani = json_encode([]);
                    $video->varovani_zpracovani = json_encode([]);
                    $video->napovedy_zpracovani = json_encode([]);
                    $video->video_streams = json_encode([$container]);
                    $video->audio_streams = json_encode([]);

                    $video->naplanovany_konec = date('Y-m-d H:i:s', strtotime($video->skutecny_start) + ($duration * 1000) / 1000);
                    $video->skutecny_konec = date('Y-m-d H:i:s', strtotime($video->skutecny_start) + ($duration * 1000) / 1000);

                    $video->delka = $durationFormatted;
                    $video->rozmery = $width . "x" . $height;
                    $video->kvalita = $video->rozmery >= '1280x720' ? 'hd' : 'sd';
                    $video->stav_zpracovani = "succeeded";

                    if ($video->save()) {
                        Log::info('Video zpracováno');
                    } else {
                        Log::warning('Uložení videa se nezdařilo');
                    }
                }
            } else {
                Log::info('Nebylo nalezeno žádné video čekající na zpracování (in_queue)');
            }

            Log::info('Zpracování videí bylo dokončeno');
        } catch (\Exception $e) {
            Log::error('Chyba při zpracování videí: ' . $e->getMessage());
        }
    }
}

But I don't know where the problem is (after 2 days of searching). Can anyone help me find where the problem is?