"Your configuration files are not serializable." error when use artisan config:cache command

My config working well but I can't cache my markdown.php

'commonmark_options' => [
  'embeds' => [
    new CustomYouTube(),
  ],
  ...
  ...
],

When I set markdown.php config like this I get this error:

$ php artisan config:cache
Configuration cache cleared!

   LogicException 

  Your configuration files are not serializable.

  at C:\Users\FIRAT\WebstormProjects\project\vendor\laravel\framework\src\Illuminate\Foundation\Console\ConfigCacheCommand.php:80
     76▕             require $configPath;
     77▕         } catch (Throwable $e) {
     78▕             $this->files->delete($configPath);
     79▕
  ➜  80▕             throw new LogicException('Your configuration files are not serializable.', 0, $e);
     81▕         }
     82▕
     83▕         $this->info('Configuration cached successfully!');
     84▕     }

  1   C:\Users\FIRAT\WebstormProjects\project\bootstrap\cache\config.php:616
      Error::("Call to undefined method Ueberdosis\CommonMark\Services\CustomYouTube::__set_state()")

  2   C:\Users\FIRAT\WebstormProjects\project\vendor\laravel\framework\src\Illuminate\Foundation\Console\ConfigCacheCommand.php:76
      require()

config/markdown.php

<?php
  
  use App\Libraries\CommonMark\Extension\Embeds\Services\CustomYouTube;
  use BenFiratKaya\CommonMarkExtension\LinkTextViewerExtension;
  use BenFiratKaya\CommonMarkExtension\UnderlineExtension;
  use League\CommonMark\Extension\Autolink\AutolinkExtension;
  use League\CommonMark\Extension\ExternalLink\ExternalLinkExtension;
  use League\CommonMark\Extension\Strikethrough\StrikethroughExtension;
  use SimonVomEyser\CommonMarkExtension\LazyImageExtension;
  use Ueberdosis\CommonMark\EmbedExtension;
  
  return [
    'code_highlighting'       => [
      /*
       * To highlight code, we'll use Shiki under the hood. Make sure it's installed.
       *
       * More info: https://spatie.be/docs/laravel-markdown/v1/installation-setup
       */
      'enabled' => true,
      
      /*
       * The name of or path to a Shiki theme
       *
       * More info: https://github.com/shikijs/shiki/blob/master/docs/themes.md
       */
      'theme'   => 'one-dark-pro',
    ],
    
    /*
     * When enabled, anchor links will be added to all titles
     */
    'add_anchors_to_headings' => true,
    
    /*
     * These options will be passed to the league/commonmark package which is
     * used under the hood to render markdown.
     *
     * More info: https://spatie.be/docs/laravel-markdown/v1/using-the-blade-component/passing-options-to-commonmark
     */
    'commonmark_options'      => [
      'renderer'           => [
        'block_separator' => "\n",
        'inner_separator' => "\n",
        'soft_break'      => "\n",
      ],
      'commonmark'         => [
        'enable_em'              => true,
        'enable_strong'          => true,
        'use_asterisk'           => true,
        'use_underscore'         => true,
        'unordered_list_markers' => ['-', '*', '+'],
      ],
      'external_link'      => [
        'internal_hosts'     => '/(^|\.)voxelon\.net$/',
        'open_in_new_window' => true,
        'html_class'         => 'external-link',
        'nofollow'           => 'external',
        'noopener'           => 'external',
        'noreferrer'         => 'external',
      ],
      'link_text_viewer'   => [
        'internal_hosts' => '/(^|\.)voxelon\.net$/',
        'link_type'      => 'all',
      ],
      'embeds'             => [
        new CustomYouTube('100%', '300', true),
      ],
      'html_input'         => 'escape',
      'allow_unsafe_links' => false,
      'max_nesting_level'  => 3,
    ],
    
    /*
     * Rendering markdown to HTML can be resource intensive. By default
     * we'll cache the results.
     *
     * You can specify the name of a cache store here. When set to `null`
     * the default cache store will be used. If you do not want to use
     * caching set this value to `false`.
     */
    'cache_store'             => null,
    
    /*
     * This class will convert markdown to HTML
     *
     * You can change this to a class of your own to greatly
     * customize the rendering process
     *
     * More info: https://spatie.be/docs/laravel-markdown/v1/advanced-usage/customizing-the-rendering-process
     */
    'renderer_class'          => Spatie\LaravelMarkdown\MarkdownRenderer::class,
    
    /*
     * These extensions should be added to the markdown environment. A valid
     * extension implements League\CommonMark\Extension\ExtensionInterface
     *
     * More info: https://commonmark.thephpleague.com/2.1/extensions/overview/
     */
    'extensions'              => [
      new ExternalLinkExtension,
      new AutolinkExtension,
      new LinkTextViewerExtension,
      new LazyImageExtension,
      new EmbedExtension,
      new StrikethroughExtension,
      new UnderlineExtension
    ],
    
    /*
     * These block renderers should be added to the markdown environment. A valid
     * renderer implements League\CommonMark\Renderer\NodeRendererInterface;
     *
     * More info: https://commonmark.thephpleague.com/2.1/customization/rendering/
     */
    'block_renderers'         => [
      // ['class' => FencedCode::class, 'renderer' => new MyCustomCodeRenderer(), 'priority' => 0]
    ],
    
    /*
     * These inline renderers should be added to the markdown environment. A valid
     * renderer implements League\CommonMark\Renderer\NodeRendererInterface;
     *
     * More info: https://commonmark.thephpleague.com/2.1/customization/rendering/
     */
    'inline_renderers'        => [
      // ['class' => FencedCode::class, 'renderer' => new MyCustomCodeRenderer(), 'priority' => 0]
    ],
  ];

How can I fix this?