ERR_CRYPTO_CUSTOM_ENGINE_NOT_SUPPORTED

所请求的 OpenSSL 引擎（例如，通过 clientCertEngine 或 privateKeyEngine TLS 选项）不受正在使用的 OpenSSL 版本的支持，可能是由于编译时标志 OPENSSL_NO_ENGINE。

¥An OpenSSL engine was requested (for example, through the clientCertEngine or privateKeyEngine TLS options) that is not supported by the version of OpenSSL being used, likely due to the compile-time flag OPENSSL_NO_ENGINE.