Hello,
Thank you for contacting Rank Math today.
Could you please share your website URL to check further? You can add it in the sensitive data section.

Please also share the screenshots of the errors in Google Search Console so that we can advise you further.
You can also share some screenshots of the issue using https://imgbb.com/
Looking forward to helping you. Thank you.
Hello,
The URL that you shared is returning a 404 error.
Could you please check and provide the correct sitemap URL?
However, you can follow the below steps and see if that helps:
1. Flush the Sitemap cache by following this video screencast:
https://i.rankmath.com/pipRDp
2. Exclude the Sitemap files of the Rank Math plugin in your caching plugin. The cache could be via a plugin or from the server. For plugins or Cloudflare, please follow this article:
https://rankmath.com/kb/exclude-sitemaps-from-caching/
Once done, clear your website cache and resubmit the sitemap_index.xml in the Search Console.
I hope this helps.
Looking forward to helping you.
Hello,
All the variations of the sitemap are returning 200 status, you can check using https://httpstatus.io/:

Please ensure that only 1 version of the sitemap is working (200 status), and the rest are redirecting to it.
Please follow the steps in this link:
https://rankmath.com/kb/couldnt-fetch-error-google-search-console/#5-check-for-the-correct-version-of-the-sitemap and redirect to the correct version.
Once done, clear your website cache and resubmit the sitemap_index.xml in the Search Console.
I hope this helps.
Looking forward to helping you.
Hello,
Since we did not hear back from you for 15 days, we are assuming that you found the solution. We are closing this support ticket.
If you still need assistance or any other help, please feel free to open a new support ticket, and we will be more than happy to assist.
Thank you.