Hello,
Thank you for contacting Rank Math and sorry for any inconvenience that might have been caused due to that.
The root folder means the main folder, the one where WordPress is installed (where you have the folders /wp-content/, /wp-includes/ and so on…).
There you should have a robots.txt and since Rank Math uses a virtual one, you should delete that file (or you could copy its content, delete the file and paste its content in the Rank Math editor after that, so you have the same robots.txt but in Rank Math).
Looking forward to helping you. Thank you.
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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.