Issue #3337216: DI problems

src/Plugin/Field/FieldWidget/PrivateMessageThreadMemberWidget.php

@@ -75,13 +75,6 @@ class PrivateMessageThreadMemberWidget extends EntityReferenceAutocompleteWidget
    */
   protected Config $config;
 
-  /**
-   * The key/value storage collection.
-   *
-   * @var \Drupal\Core\KeyValueStore\KeyValueStoreInterface
-   */
-  protected KeyValueStoreInterface $keyValueStore;
-
   /**
    * Constructs a PrivateMessageThreadMemberWidget object.
    *
@@ -146,7 +139,7 @@ class PrivateMessageThreadMemberWidget extends EntityReferenceAutocompleteWidget
       $container->get('request_stack'),
       $container->get('entity_type.manager'),
       $container->get('config.factory'),
-      $container->get('keyvalue')->get('entity_autocomplete')
+      $container->get('keyvalue'),
     );
   }
 
@@ -245,8 +238,9 @@ class PrivateMessageThreadMemberWidget extends EntityReferenceAutocompleteWidget
     $data = serialize($selection_settings) . $target_type . $selection_handler;
     $selection_settings_key = Crypt::hmacBase64($data, Settings::getHashSalt());
 
-    if (!$this->keyValueStore->has($selection_settings_key)) {
-      $this->keyValueStore->set($selection_settings_key, $selection_settings);
+    $key_value_storage = $this->keyValue->get('entity_autocomplete');
+    if (!$key_value_storage->has($selection_settings_key)) {
+      $key_value_storage->set($selection_settings_key, $selection_settings);
     }
 
     $url = Url::fromRoute('private_message.members_widget_callback', [