Fatal error: Uncaught Error: Class 'Opis\JsonSchema\Keywords\AbstractRefKeyword' not found in /home/cleangre/public_html/wp-content/plugins/woocommerce/vendor/opis/json-schema/src/Keywords/TemplateRefKeyword.php:25 Stack trace: #0 {main} thrown in /home/cleangre/public_html/wp-content/plugins/woocommerce/vendor/opis/json-schema/src/Keywords/TemplateRefKeyword.php on line 25