Hello Dhayaknila
Thanks for reaching out regarding your sitemap.
I loaded the sitemap index and the individual sitemaps and they are all fine; I am not sure why Google Search Console is reporting that it can’t fetch the sitemap. I checked it in the sitemap validator and there are no errors.
1. Clear all your caching from your theme, plugin, server, CDN like CloudFlare or browser. If you are not sure how to clear cache from theme/plugin please speak to those authors. If you want to clear cache from the server, please speak to your host provider. To clear the cache from a browser use this guide: https://yoast.com/help/how-to-clear-my-browsers-cache/.
2. Delete your sitemap in Google. Doing so will not hurt the SEO of the site. This guide explains more (scroll to the bottom): https://support.google.com/webmasters/answer/183669?hl=en.
3. Submit the sitemap again. Be sure to submit only sitemap_index.xml and nothing else. This guide explains more: https://yoast.com/help/submit-sitemap-search-engines/.
We are going ahead and marking this issue as resolved due to inactivity. If you require any further assistance please create a new issue.
