Hello,
Thank you for contacting Rank Math and sorry for any inconvenience that might have been caused due to that.
Are you able to access your WordPress dashboard? If you are, just head over to your WordPress Dashboard > Plugins, deactivate and delete the plugin.
If you cannot access your WordPress dashboard, you can remove/rename the plugin this way. Here is a guide on this: https://support.bestwebsoft.com/hc/en-us/articles/204977945-Delete-remove-uninstall-Wordpress-plugin-manually-via-FTP
Hope this helps you. Thank 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.