Hello,
Thank you for contacting Rank Math today, and we apologize for any inconvenience this may have caused.
For a detailed guide to migrate data from Yoast to Rank Math, you may refer to this article: https://rankmath.com/kb/yoast-seo-migration/
Are you importing large data from Yoast to Rank Math that requires processing for 1.5 hours? If so, your server might be experiencing a heavy load when executing the import process thus, occurring an error.
If you have any issues regarding anything related to Rank Math please let us know the details about those and we’ll do our best to assist you.
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.