How do I add a link?

I created a custom module for Drupal 8.6, and I want to post a link to my terms and conditions.

This is the code I am using.

namespace Drupal\commerce_agree_cgv\Plugin\Commerce\CheckoutPane;  use Drupal\Core\Form\FormStateInterface; use Drupal\commerce_checkout\Plugin\Commerce\CheckoutPane\CheckoutPaneBase; use Drupal\commerce_checkout\Plugin\Commerce\CheckoutPane\CheckoutPaneInterface; use Drupal\commerce_cart\Controller\CartController; use Drupal\node\Entity\Node; use Drupal\Core\Link; use Drupal\Core\Url;  /**  * Provides the completion message pane.  *  * @CommerceCheckoutPane(  *   id = "agree_cgv",  *   label = @Translation("Agree CGV"),  *   default_step = "review",  * )  */ class AgreeCGV extends CheckoutPaneBase implements CheckoutPaneInterface {    /**    * {@inheritdoc}    */   public function buildPaneForm(array $  pane_form, FormStateInterface $  form_state, array &$  complete_form) {     $  link = Link::createFromRoute($  this->t('my terms'), 'entity.node.canonical', ['node' => 1], ['attributes' => ['target' => '_blank']])->toString();     $  pane_form['cgv'] = [       '#type' => 'checkbox',       '#default_value' => FALSE,       '#title' => $  this->t('I have read and accept', ['the general terms and conditions of business' => $  link]),       '#required' => TRUE,       '#weight' => $  this->getWeight(),     ];     return $  pane_form;   }  } 

The link does not work. When I go to my page, the link is missing.

enter image description here

The server runs on PHP 7.2.

How do I display the link?