Hello,
Thank you for contacting us and sorry for any inconvenience that might have been caused due to that.
You’re facing this error because of the Product Schema on your category page. Please note that Google recommends disabling the schema to your product archives like categories, brands, tags, etc. The Product Schema is only for the actual product, and not for anything else. You can check this link for more information: https://developers.google.com/search/docs/data-types/product#guidelines
In order to resolve this issue, please remove the snippet data from your category archive pages. To do that, please enable the option Remove Snippet Data
from WordPress Dashboard > Rank Math > Titles & Meta > Product Categories.

Once done, please clear your website cache and check the URL again with Google’s Rich Results Test.
However, it looks like you’re currently using the Rank Math PRO plugin on your website, but the account you have used to open this ticket is the Rank Math free version.
Can you please search and forward a receipt from FastSpring.com so we can locate your account and verify it?
Let us know how it goes. Looking forward to helping you.
Thank you.
Hello,
I have updated the sensitive data as requested. Can you please check further?
Thank you.
Hello,
Thank you for your patience.
We’ve checked the page again, and it is still showing the product schema on your category pages.
Could you please confirm if you have already removed the product schema on those pages?
Looking forward to helping you.
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.