error: bad line length character: HTTP

This error message typically occurs when there is a problem with the format of an HTTP request or response.

HTTP requests and responses are typically formatted according to a specific set of rules, and if any part of the message violates these rules, it can result in an error like the one you're seeing.

To fix this error, you'll need to carefully review the HTTP message that is generating the error and look for any formatting issues. Some common causes of this error include:

- Extra whitespace or newlines in the message
- Improperly formatted headers or body content
- Malformed request or response line

Once you've identified the issue, you can make the necessary changes to fix the formatting and re-send the HTTP message.