What are the different error codes?

Now that you have a high-level understanding of HTTP status codes, we will look at the commonly encountered errors.

  1. 400 Bad Request. …
  2. 401 Unauthorized. …
  3. 403 Forbidden. …
  4. 404 Not Found. …
  5. 500 Internal Server Error. …
  6. 502 Bad Gateway. …
  7. 503 Service Unavailable. …
  8. 504 Gateway Timeout.

For More Information Please Refer: https://www.digitalocean.com/community/tutorials/how-to-troubleshoot-common-http-error-codes