Fatal error: Declaration of Drupal\search_api_elasticsearch_client\Plugin\search_api\backend\ElasticSearchBackend::__sleep() must be compatible with Drupal\search_api\Backend\BackendPluginBase::__sleep(): array in /app/docroot/modules/contrib/search_a

Problem/Motivation

Fatal error: Declaration of Drupal\search_api_elasticsearch_client\Plugin\search_api\backend\ElasticSearchBackend::__sleep() must be compatible with Drupal\search_api\Backend\BackendPluginBase::__sleep(): array in /app/docroot/modules/contrib/search_a
pi_elasticsearch_client/src/Plugin/search_api/backend/ElasticSearchBackend.php on line 464