Hello,
Thanks for contacting us, and sorry for any inconvenience that might have been caused due to that.
Can you please follow the steps mentioned in the guide below without skipping any of them? This should help you to figure out and resolve the issue.
https://rankmath.com/kb/couldnt-fetch-error-google-search-console/
Note: after applying the fix, please try re-submitting your sitemap to GSC to see if that’s working.
Looking forward to helping you.
Thank 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.