Hello,
Thank you for contacting the support and sorry for any inconvenience that might have been caused due to that.
For initial troubleshooting, please ensure that the Rank Math redirections tables are created on your site.
Head over to Rank Math > Status & Tools > Database Tools and recreate the Rank Math tables by clicking this button:

Once done, clear your website’s cache and check again.
Let us know how this goes.
Thank you.
Thank you, now it’s working fine. I really appreciate your help. I appreciate your assistance. Thank you so much.
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.