Fatal error: Uncaught Error: Class 'Opis\JsonSchema\Validator' not found in D:\www\wordpress - 安裝環境+外掛測試\02.外掛程式\購物外掛\woocommerce\vendor\opis\json-schema\src\CompliantValidator.php:20 Stack trace: #0 {main} thrown in D:\www\wordpress - 安裝環境+外掛測試\02.外掛程式\購物外掛\woocommerce\vendor\opis\json-schema\src\CompliantValidator.php on line 20