Title: Sitemap Unknown Error
Last modified: June 4, 2026

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# Sitemap Unknown Error

 *  Resolved [silveraden](https://wordpress.org/support/users/silveraden/)
 * (@silveraden)
 * [4 days, 8 hours ago](https://wordpress.org/support/topic/sitemap-unknown-error/)
 * I excluded post tags from showing on search engines and then I get this error.
   Please help. I already removed the plugin and reinstalled it but the same error
   happen. Thank you
 * ![](https://i0.wp.com/www.sellmobilehome.com/wp-content/uploads/2026/06/error.
   jpg?ssl=1)
    -  This topic was modified 4 days, 8 hours ago by [silveraden](https://wordpress.org/support/users/silveraden/).
 * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Fsitemap-unknown-error%2F%3Foutput_format%3Dmd&locale=en_US)
   to see the link]_

Viewing 2 replies - 1 through 2 (of 2 total)

 *  Plugin Support [Maybellyne](https://wordpress.org/support/users/maybellyne/)
 * (@maybellyne)
 * [4 days, 7 hours ago](https://wordpress.org/support/topic/sitemap-unknown-error/#post-18928931)
 * Hello [@silveraden](https://wordpress.org/support/users/silveraden/),
 * Thanks for reaching out about your sitemap. [https://www.sellmobilehome.com/sitemap_index.xml](https://www.sellmobilehome.com/sitemap_index.xml)
   works but [https://sellmobilehome.com/sitemap_index.xml](https://sellmobilehome.com/sitemap_index.xml)
   does not work. I confirmed the error in Mozilla Firefox, though the sitemap is
   blank in Google Chrome. Also, the [stylesheet](https://www.sellmobilehome.com/wp-content/plugins/wordpress-seo/css/main-sitemap.xsl)
   and [sitemap source](http://view-source:https://sellmobilehome.com/sitemap_index.xml)(
   including the sub-sitemaps) work as expected.
 * The non-www sitemap URL (`https://sellmobilehome.com/sitemap_index.xml`) returns
   a `200 OK` response instead of redirecting to the preferred www version. Since
   Yoast SEO generates the sitemap based on the site’s configured URLs, we would
   expect the non-www URL to redirect to the www URL if that is your preferred domain
   format. This redirect is typically handled at the server, hosting, or CDN level
   rather than by Yoast SEO.
 * Could you please confirm the values of **WordPress Address (URL)** and **Site
   Address (URL)** under **Settings → General**?
 *  Thread Starter [silveraden](https://wordpress.org/support/users/silveraden/)
 * (@silveraden)
 * [4 days, 7 hours ago](https://wordpress.org/support/topic/sitemap-unknown-error/#post-18928936)
 * Hi Maybellyne,
 * Sorry, it was a mistake on my part. I didn’t noticed that the url has no www.
   Thanks again, there is no issue, just typing the url incorrectly.

Viewing 2 replies - 1 through 2 (of 2 total)

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 * 2 replies
 * 2 participants
 * Last reply from: [silveraden](https://wordpress.org/support/users/silveraden/)
 * Last activity: [4 days, 7 hours ago](https://wordpress.org/support/topic/sitemap-unknown-error/#post-18928936)
 * Status: resolved