Thank you for contacting Rank Math and sorry for any inconvenience that might have been caused due to that.
There is a wp-json endpoint error reported on the console on the Rank Math dashboard that could be preventing the saving of the options. Please get in touch with your host so that they can help in fixing the server rewrite issue.
I have shared the error on the sensitive data section.
Looking forward to helping you. Thank you.
Ok, thanks. I will try to repair it. But, why are the sitemaps not working (showing 404 error)?
Thanks for the question.
It looks like the issue is only affecting the page sitemap the category sitemap works as expected. Please check the global robots meta to ensure that pages have not been set to noindex.
Additionally, please head over to Rank Math > Sitemaps and change the links per sitemap and hit save and also click save on the Settings > Permalinks page.
I hope this info helps. Thank you.
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.