0a1,26
> diff --git a/modules/preview_graphql_jwt/preview_graphql_jwt.module b/modules/preview_graphql_jwt/preview_graphql_jwt.module
> index 8900b62..fc97f17 100644
> --- a/modules/preview_graphql_jwt/preview_graphql_jwt.module
> +++ b/modules/preview_graphql_jwt/preview_graphql_jwt.module
> @@ -28,7 +28,7 @@ function preview_graphql_jwt_help($route_name, RouteMatchInterface $route_match)
>          '#value' => $content,
>        ];
>        $output = '';
> -      $output .= render($build);
> +      $output .= \Drupal::service('renderer')->render($build);
>        return $output;
>    }
>    return '';
> diff --git a/preview_graphql.module b/preview_graphql.module
> index 5a07b59..da6320c 100644
> --- a/preview_graphql.module
> +++ b/preview_graphql.module
> @@ -32,7 +32,7 @@ function preview_graphql_help($route_name, RouteMatchInterface $route_match) {
>          '#value' => $content,
>        ];
>        $output = '';
> -      $output .= render($build);
> +      $output .= \Drupal::service('renderer')->render($build);
>        return $output;
>    }
>    return '';
2c28
< index 2976fe7..7bcd534 100644
---
> index 2976fe7..cd8a1a9 100644
5,10c31
< @@ -9,7 +9,7 @@ use Symfony\Component\EventDispatcher\Event;
<   *
<   * @see \Drupal\preview_graphql\Form\SettingsForm.
<   */
< -class CarrierCallbackOptionEvent extends Event {
< +class CarrierCallbackOptionEvent extends \Symfony\Contracts\EventDispatcher\Event {
---
> @@ -2,7 +2,7 @@
12c33
<    const EVENT_NAME = 'preview_graphql.carrier_callback_option';
---
>  namespace Drupal\preview_graphql\Event;
13a35,39
> -use Symfony\Component\EventDispatcher\Event;
> +use Symfony\Contracts\EventDispatcher\Event;
>  
>  /**
>   * Event that is fired when settings of carrier callback element is building.
15c41
< index e636cd4..27b8540 100644
---
> index e636cd4..0b6d0eb 100644
18c44,50
< @@ -7,7 +7,7 @@ use Symfony\Component\EventDispatcher\Event;
---
> @@ -2,7 +2,7 @@
>  
>  namespace Drupal\preview_graphql\Event;
>  
> -use Symfony\Component\EventDispatcher\Event;
> +use Symfony\Contracts\EventDispatcher\Event;
>  
21,26c53,65
<   */
< -abstract class PreviewGraphQlEventBase extends Event {
< +abstract class PreviewGraphQlEventBase extends \Symfony\Contracts\EventDispatcher\Event {
<  
<    /**
<     * The type carrier callback key.
---
> diff --git a/src/Plugin/GraphQL/Fields/PreviewGraphQLField.php b/src/Plugin/GraphQL/Fields/PreviewGraphQLField.php
> index 6b49456..ceaba26 100644
> --- a/src/Plugin/GraphQL/Fields/PreviewGraphQLField.php
> +++ b/src/Plugin/GraphQL/Fields/PreviewGraphQLField.php
> @@ -69,7 +69,7 @@ class PreviewGraphQLField extends FieldPluginBase implements ContainerFactoryPlu
>      $event = new ContextResolverCacheEvent($carrier_callback, $context);
>      $this->previewGraphQLManager->getPreviewGraphQlBackend()
>        ->getEventDispatcher()
> -      ->dispatch(ContextResolverCacheEvent::EVENT_NAME, $event);
> +      ->dispatch($event, ContextResolverCacheEvent::EVENT_NAME);
>      $result = $this->previewGraphQLManager->getCacheDataValue('gql');
>      if (is_array($result) && !empty($result['error'])) {
>        throw new Error(sprintf('%s', $result['error']));