# S00018 {#S00018}

## Error Code {#error_code .section}

S00018

## Error Message {#error_message .section}

`SSL error: <xxx>. RefId: S00018`

## Probable Causes {#probable_causes .section}

After enabling *enableHTTPS*, the web application communicates with the DolphinDB server through the HTTPS protocol. This error occurs when anything goes wrong during the communication.

## Solutions {#solutions .section}

Troubleshoot based on the specific error message and the [OpenSSL documentation](https://docs.openssl.org/1.0.2/man3/SSL_get_error/). If the error cannot be solved, contact DolphinDB technical support.

**Parent topic:**[Error Code Reference](../../Troubleshooting/ErrorCode.md)

