Hello,
Thank you for contacting Rank Math and bringing your concern to our attention. I’m sorry for any inconvenience this issue may have caused you.
This usually happens when the date archives option is disabled.
To fix this, please navigate to WP Dashboard > Rank Math > Titles & Meta > Misc Pages and enable the Date Archives as this option is disabled by default

Here’s a link for more information:
https://rankmath.com/kb/titles-and-meta/#date-archives
Hope that helps.
Thank you.
Thanks a lot! Problem resolved.
Since when is this option in Rank Math? What are the benefits of deactivating the archive?
Hello,
Date Archives are useful only in certain situations, and on most websites, they should be disabled.
In general, we recommend disabling this because date archive pages usually aren’t very helpful for people looking for specific posts. But it’s up to you to decide what’s best for your site.
Hope that helps, and please do not hesitate to let us know if you need our assistance with anything else.
Thank you.
Hello,
Glad that helped.
If you have any other concerns, please don’t hesitate to contact us anytime to assist you further.
Looking forward to helping you.
Thank you.