composer exec CertificateDownloader.php -- -k ${apiV3key} -m ${mchId} -f ${mchPrivateKeyFilePath} -s ${mchSerialNo} -o ${outputFilePath}

使用上述命令行运行，报错

Cannot found the serial(`PUB_KEY_ID_aaaaaa`)'s configuration, which's from the response(header:Wechatpay-Serial), your's any,1B690BBBBBBB.

商户id： 1592719811

1B690BBBBBBB：这个是平台证书序列号