Fatal error: Uncaught Error: Class 'Tobscure\JsonApi\AbstractSerializer' not found in /home/gcpsxdwf/public_html/forum.oandplibrary.org/vendor/flarum/core/src/Api/Serializer/AbstractSerializer.php:27 Stack trace: #0 {main} thrown in /home/gcpsxdwf/public_html/forum.oandplibrary.org/vendor/flarum/core/src/Api/Serializer/AbstractSerializer.php on line 27