Hi H,
Thanks for getting in touch with us.
Please get in touch with your web hosting provider about this as the issue is coming from your server.
501 error is a server related error and you can read more about it here:
https://www.computerhope.com/issues/ch001020.htm
Hope that helps and please do not hesitate to let us know if you need our assistance with anything else.
thank u dear
yes you are right
after 1 day its solved those error made by servers
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/?rate=5#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.