Fatal error: Declaration of Drupal\elasticsearch_connector\Plugin\search_api\backend\SearchApiElasticsearchBackend::__sleep() must be compatible with Drupal\search_api\Backend\BackendPluginBase::__sleep(): array in /home/clients/0b0410226929a2217c55e05b2a446931/sites/d9.allnews.ch/web/modules/contrib/elasticsearch_connector/src/Plugin/search_api/backend/SearchApiElasticsearchBackend.php on line 1236