Hello,
We apologize for the issue you are facing with your sitemap not being fetched. Here are some steps you can follow to troubleshoot and potentially fix the "Couldn’t fetch" error in Google Search Console:
1. Validate Your Sitemap
Make sure your sitemap is correctly configured by validating it using the Validate XML Sitemap tool. Enter your sitemap URL and click VALIDATE SITEMAP. If there are no issues, you should see a success message.

2. Ensure the Sitemap is Located in the Root Folder
Check that your sitemap is located in the root folder of your WordPress installation. The URL should look like this:
`https://rankmath.com/wp-content/uploads/2023/01/increase-links-per-sitemap-1.jpg
3. Ensure Your Posts Are Set to Index
If all your posts are set to noindex, your sitemap will be empty. Go to Rank Math SEO → Titles & Meta and ensure the Index checkbox is enabled for your posts.

4. Flush the Cache
If your sitemap appears outdated, flush the sitemap cache by increasing the value of Links Per Sitemap by one in Rank Math SEO → Sitemap Settings, then save changes. Also, go to Settings → Permalinks and click Save Changes to apply the current settings.

5. Add the Correct Site URL to Google Search Console
Ensure that you have added the correct version of your site URL in Google Search Console. You can check this in your WordPress dashboard under Settings → General.

6. Resubmit Your Sitemap
After making these changes, resubmit your sitemap URL in Google Search Console under Indexing → Sitemaps.
If you continue to experience issues after following these steps, please reply to this ticket, and a human agent from our support team will assist you further. Thank you for your patience!
Sources:
Troubleshooting the “Couldn’t Fetch” Error in Google Search Console » Rank Math
I cekh this. Everything is ok and perfect but This problem not solved. Please Dear told me what i to Do?
Hello,
We’ve checked your sitemap, but it is currently generated by the Yoast plugin.
Let us know if the issue persists using Rank Math so we can check further.
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.