Hello,
Thank you for contacting Rank Math and sorry for any inconvenience that might have been caused due to that.
Could you please enable debugging on your site by adding the following constants on your wp-config.php file on the root of your site then try to re-import the data once more.
define('WP_DEBUG', true);
define('WP_DEBUG_LOG', true );
define('WP_DEBUG_DISPLAY', false );
This will allow errors to be written to the file wp-content/debug.log. Please perform the import process once again and let me know the kind of errors that are reported.
Looking forward to helping 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.