Added the seeAllEvents but it is not workgin do to a bug I can't seem to fin

opencase.links.menu.yml

@@ -13,6 +13,11 @@ opencase.see_all_organisations_links:
   deriver: Drupal\opencase\Plugin\Derivative\SeeAllOrganisationsMenuLink
   menu_name: opencase
   parent: opencase.see_all
+opencase.see_all_events_links:
+  class: Drupal\opencase\Plugin\Menu\SeeAllEventsMenuLink
+  deriver: Drupal\opencase\Plugin\Derivative\SeeAllEventsMenuLink
+  menu_name: opencase
+  parent: opencase.see_all
 opencase.opencase_add_new_things_menu:
   title: 'Add new...'
   menu_name: opencase

src/Plugin/Derivative/SeeAllEventsMenuLink.php

@@ -0,0 +1,60 @@
+<?php
+
+namespace Drupal\opencase\Plugin\Derivative;
+
+use Drupal\Component\Plugin\Derivative\DeriverBase;
+use Drupal\Core\Entity\EntityTypeManagerInterface;
+use Drupal\Core\Plugin\Discovery\ContainerDeriverInterface;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+
+/**
+ *  * Derivative class that provides the menu links adding various types of events
+ *  */
+class SeeAllEventsMenuLink extends DeriverBase implements ContainerDeriverInterface
+{
+
+  /**
+   *    * @var EntityTypeManagerInterface $entityTypeManager .
+   *    */
+
+  protected $entityTypeManager;
+
+  /**
+   *    * Creates a AddActorsMenuLink instance.
+   *    *
+   *    * @param $base_plugin_id
+   *    * @param EntityTypeManagerInterface $entity_type_manager
+   *    */
+  public function __construct($base_plugin_id, EntityTypeManagerInterface $entity_type_manager)
+  {
+    $this->entityTypeManager = $entity_type_manager;
+  }
+
+  /**
+   *    * {@inheritdoc}
+   *    */
+  public static function create(ContainerInterface $container, $base_plugin_id)
+  {
+    return new static(
+      $base_plugin_id,
+      $container->get('entity_type.manager')
+    );
+  }
+
+  /**
+   *    * {@inheritdoc}
+   *    */
+  public function getDerivativeDefinitions($base_plugin_definition)
+  {
+    $links = [];
+    $eventTypes = $this->entityTypeManager->getStorage('oc_event_type')->loadMultiple();
+    foreach ($eventTypes as $id => $eventType) {
+      $links[$id] = [
+          'title' => $eventType->label(),
+          'route_name' => "view.actors.page_1", //@TODO findout why "view.events.page_1"  does not work
+          'route_parameters' => ['type' => $eventType->id()]
+        ] + $base_plugin_definition;
+    }
+    return $links;
+  }
+}

src/Plugin/Menu/SeeAllEventsMenuLink.php

@@ -0,0 +1,9 @@
+<?php
+namespace Drupal\opencase\Plugin\Menu;
+
+use Drupal\Core\Menu\MenuLinkDefault;
+
+/**
+ * Represents a menu link for seeing all Events of various types.
+ */
+class SeeAllEventsMenuLink extends MenuLinkDefault {}