Hello,
Thank you for contacting Rank Math support, and sorry for any inconvenience that might have been caused due to that.
As confirmed by you the source code of the sitemap page is empty, so, there must be a conflict with another plugin or theme. You can use the Health Check plugin to determine which plugin or theme is causing this. You can follow the step by step method by following this article: https://rankmath.com/kb/check-plugin-conflicts/
For reference you can also read about sitemap error here: https://rankmath.com/kb/fix-sitemap-issues/#blank-page
Also, please share the affected URL with us to investigate further.
I hope this helps. Looking forward to helping you.
Thank you
Thank you for your support and your help, just as you suggested the problem was with one of my theme’s plugin core features. So I could figure out the plugin that had caused the conflict with the help of Health Check plugin.
Hello,
We are super happy that this resolved your issue. If you have any other questions in the future, know that we are here to help you.
If you don’t mind me asking, could you please leave us a review (if you haven’t already) on https://wordpress.org/support/plugin/seo-by-rank-math/reviews/#new-post about your overall experience with Rank Math? We appreciate your time and patience.
If you do have another question in the future, please feel free to create a new forum topic, and it will be our pleasure to assist you again.
Thank you.