Ways to get errors: 439 (both versions): Visit a part of the website that is being updated. 404: Change the website URL to a nonexistent page. 596: Try to visit the website while banned. 436: Try to visit a page you are unauthorized for 400: Have a page not load correctly, is very rare 503: Visit a page with the wrong HTML format. 429: Change the website URL repeatedly really fast. ( @Goomba128 's suggestion ) 418: None, used as a joke. 500: Used for unidentifiable server errors. 301: Go to a page that has moved permanently. 422: Make a well-formed but unprocessable request.