Hello,
Thanks for contacting us and sorry for any inconvenience that might have been caused due to that.
Unfortunately, our scope of support does not extend to screen sharing or video calls. You will have to provide the WordPress & FTP login details if you want us to fix the issue. You can also follow this guide to fix the issue on your own: https://rankmath.com/kb/cant-edit-robots-txt/
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.