Hello,
Thank you for your query and we are so sorry about the trouble this must have caused.
Please head over to your WordPress Dashboard > Rank Math > Status & Tools > Import & Export and try importing Yoast data again. See the screenshot below for your reference:

Let us know how that goes. Looking forward to helping you.
It worked this time. Thanks!
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.