Hello,
Thank you for contacting Rank Math, and sorry for any inconvenience caused.
Please follow these steps:
1. Update to the latest version of Rank Math
2. Ensure that the Advanced Mode is selected:

3. Re-create tables by clicking WP Dashboard > Rank Math > Status & Tools > Database Tools and click the Re-create database Table button.

Please let us know if that helps.
Hello,
I have completed the ‘re-create tables’ function and it has allowed me to redirect the links that are hitting our 404-page but it is not allowing me to add new redirects. When I try to add new redirects it just continues to take me to a blank white page. Is there something else I can try to fix the issue?
Thank you
It seems to be fixed now, since I can add redirects. Thank you for your help!
Hello,
We are super happy that you can add new redirects now.
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 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.