APIv3解密返回false ，APIv3密钥没错 sdk用的官方的

PHP执行以下语句时，返回[]，请各位大神帮忙解决！ $instance = Builder::factory([     'mchid'      => $merchantId,     'serial'     => $merchantCertificateSerial,     'privateKey' => $merchantPrivateKeyInstance,     'certs'      => [         $platformCertificateSerial => $platformPublicKeyInstance,     ], ]);