Hello,
Thank you for contacting us and sorry for any inconvenience that might have been caused due to that.
This issue is happening because under WordPress Dashboard > Rank Math > Titles & Meta > Posts you have setup the “Primary Taxonomy” to “None”. If you want to use categories you need to switch that option back to “Categories”.
Hope this helps solve your issue.
βββββββDon’t hesitate to get in touch if you require any further assistance.
Hello,
Since we did not hear back from you for 15 days, we are assuming that you found the solution. We are closing this support ticket.
If you still need assistance or any other help, please feel free to open a new support ticket, and we will be more than happy to assist.
Thank you.