Read the $certificate failed, please check it whether or nor correct

[lenny168]

'private_key' => __DIR__ . '\certs\apiclient_key.pem',
 'certs' => __DIR__ . '\certs\apiclient_cert.pem',

下载好证书，放入该目录下，不清楚找不到证书是因为那里的问题，有点懵了