Hello,
Thank you for your query and we are so sorry about the trouble this must have caused.
The latest versions of our plugin don’t call that file anywhere in the settings and that’s why it’s not included by default with the CMB2 library we load.
Could you please make sure that you are using the latest version of our plugin? https://rankmath.com/changelog
This could also be caused by another plugin using CMB2 and using the implementation bundled with our plugin that could cause this issue, so we recommend checking for plugin conflicts as well: https://rankmath.com/kb/check-plugin-conflicts/
Hope this helps pinpoint the exact issue.
Don’t hesitate to get in touch if you have any other questions.
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.