Extra parameters passed to parent construct $directoryHelper

Try with below code:

class PreviewButton extends OriginalPreviewButton { protected $_directoryHelper; public function __construct( \Magento\Backend\Block\Template\Context $context, \Magento\Framework\View\Element\BlockFactory $blockFactory, array $data = [], ?SecureHtmlRenderer $jsonHelper = null, ?DirectoryHelper $directoryHelper = null ) { parent::__construct($context, $data, $jsonHelper, $directoryHelper); $this->blockFactory = $blockFactory; } 

You have to move the '$data' array to last param as given below.

 class PreviewButton extends \Magento\Config\Block\System\Config\Form\Field { protected $blockFactory; public function __construct( \Magento\Backend\Block\Template\Context $context, \Magento\Framework\View\Element\BlockFactory $blockFactory, SecureHtmlRenderer $jsonHelper = null, DirectoryHelper $directoryHelper = null, array $data = [] ) { $this->blockFactory = $blockFactory; parent::__construct($context, $data); } } 

There is an error in your "base" class constructor when you are calling its parent method:

class PreviewButton extends \Magento\Config\Block\System\Config\Form\Field { protected $blockFactory; public function __construct( \Magento\Backend\Block\Template\Context $context, \Magento\Framework\View\Element\BlockFactory $blockFactory, array $data = [], ?SecureHtmlRenderer $jsonHelper = null, ?DirectoryHelper $directoryHelper = null ) { $this->blockFactory = $blockFactory; parent::__construct($context, $data, $jsonHelper, $directoryHelper); // here } } 

As I can see from this class on Magento 2.4.6, it has a different set of arguments:

class Field extends \Magento\Backend\Block\Template implements \Magento\Framework\Data\Form\Element\Renderer\RendererInterface { /** * @var SecureHtmlRenderer */ private $secureRenderer; /** * @param Context $context * @param array $data * @param SecureHtmlRenderer|null $secureRenderer */ public function __construct( Context $context, array $data = [], ?SecureHtmlRenderer $secureRenderer = null ) { parent::__construct($context, $data); $this->secureRenderer = $secureRenderer ?? ObjectManager::getInstance()->get(SecureHtmlRenderer::class); } } 

You get an error on the $directoryHelper (4th argument when only 3 exist in the original class). Try to change your "base" class code to this one, run setup:di:compile and test:

class PreviewButton extends \Magento\Config\Block\System\Config\Form\Field { protected $blockFactory; public function __construct( \Magento\Backend\Block\Template\Context $context, \Magento\Framework\View\Element\BlockFactory $blockFactory, array $data = [], ?SecureHtmlRenderer $jsonHelper = null, ?DirectoryHelper $directoryHelper = null ) { $this->blockFactory = $blockFactory; parent::__construct($context, $data); // changed } }