Argument 6 passed to Drupal\layout_builder\Plugin\Block\InlineBlock::__construct() must implement interface

It's due to parameters in the constructor

public function __construct(){}

replace

public function __construct(array $configuration, $plugin_id, $plugin_definition, EntityTypeManagerInterface $entity_type_manager, EntityDisplayRepositoryInterface $entity_display_repository, AccountInterface $current_user){}

with

public function __construct(array $configuration, $plugin_id, $plugin_definition, EntityTypeManagerInterface $entity_type_manager, EntityDisplayRepositoryInterface $entity_display_repository, LoggerInterface $logger, AccountInterface $current_user = NULL) {}

The changes are: LoggerInterface $logger and AccountInterface $current_user = NULL in the constructor.

During Drupal upgrade to 9, you will see a file InlineBlock.php.rej (core/modules/layout_builder/src/Plugin/Block/InlineBlock.php.rej) which provides detail to fix the issue.

JFI: I did the change directly to the InlineBlock.php, please suggest if there is an alternative way to patch it.

InlineBlock.php.rej file contains:

***************
*** 81,90 ****
     *   The entity type manager service.
     * @param \Drupal\Core\Entity\EntityDisplayRepositoryInterface $entity_display_repository
     *   The entity display repository.
     * @param \Drupal\Core\Session\AccountInterface $current_user
     *   The current user.
     */
-   public function __construct(array $configuration, $plugin_id, $plugin_definition, EntityTypeManagerInterface $entity_type_manager, EntityDisplayRepositoryInterface $entity_display_repository, AccountInterface $current_user = NULL) {
      parent::__construct($configuration, $plugin_id, $plugin_definition);
  
      $this->entityTypeManager = $entity_type_manager;
--- 89,100 ----
     *   The entity type manager service.
     * @param \Drupal\Core\Entity\EntityDisplayRepositoryInterface $entity_display_repository
     *   The entity display repository.
+    * @param \Psr\Log\LoggerInterface $logger
+    *   A logger instance.
     * @param \Drupal\Core\Session\AccountInterface $current_user
     *   The current user.
     */
+   public function __construct(array $configuration, $plugin_id, $plugin_definition, EntityTypeManagerInterface $entity_type_manager, EntityDisplayRepositoryInterface $entity_display_repository, LoggerInterface $logger, AccountInterface $current_user = NULL) {
      parent::__construct($configuration, $plugin_id, $plugin_definition);
  
      $this->entityTypeManager = $entity_type_manager;
***************
*** 98,103 ****
        $current_user = \Drupal::currentUser();
      }
      $this->currentUser = $current_user;
    }
  
    /**
--- 108,118 ----
        $current_user = \Drupal::currentUser();
      }
      $this->currentUser = $current_user;
+     if (!$logger) {
+       @trigger_error('The logger service must be passed to InlineBlock::__construct(). It was added in drupal:9.2.0 and will be required before drupal:10.0.0.', E_USER_DEPRECATED);
+       $logger = \Drupal::service('logger.channel.layout_builder');
+     }
+     $this->logger = $logger;
    }
  
    /**