Fatal error: Uncaught Error: Class "Drupal\jsonapi\Revisions\NegotiatorBase" not found in /home/qcsvlel/www/core/modules/jsonapi/src/Revisions/VersionByRel.php:17 Stack trace: #0 {main} thrown in /home/qcsvlel/www/core/modules/jsonapi/src/Revisions/VersionByRel.php on line 17