Fatal error: Uncaught Error: Class "Opis\JsonSchema\Parsers\Vocabulary" not found in C:\xampp\htdocs\wo\woocommerce\vendor\opis\json-schema\src\Parsers\Draft.php:20 Stack trace: #0 {main} thrown in C:\xampp\htdocs\wo\woocommerce\vendor\opis\json-schema\src\Parsers\Draft.php on line 20