By deactivating the plugin I mean the Rank Math plugin. So when I deactivate Rank Math, the problem goes away and when I activate Rank Math again the problem reappears.
Hello,
Thanks for contacting us and we regret the inconvenience caused.
I tested the link (of December 2020) using https://httpstatus.io/ and it seems like a 301 redirection is applied on the link. Please enable the Debug Redirections option from your WordPress admin area > Rank Math > General Settings > Redirections. https://i.rankmath.com/yIhqBH
When the Debug Redirections are enabled, then an interstitial window is displayed before the redirection actually happens and inside that window, you will be able to find which rule is causing the Redirection.
For more details, please refer to this tutorial guide: https://rankmath.com/kb/solving-redirection-issues-using-rank-math-seo/#redirection%20debug
Please let us know how that goes.
Thanks.
Hi!
Thanks for the reply! I enabled the Debug Redirections option but the interstitial window does not appear when I click on the link. It sends me directly to the homepage.
Hello,
Thanks for your reply.
We might need to take a closer look at the settings. Please edit the first post on this ticket and include your WordPress logins in the designated Sensitive Data section.

It is completely secure and only our support staff has access to that section. If you want, you can use the below plugin to generate a temporary login URL to your website and share that with us instead:
https://wordpress.org/plugins/temporary-login-without-password/
You can use the above plugin in conjunction with the WP Security Audit Log to monitor what changes our staff might make on your website (if any):
https://wordpress.org/plugins/wp-security-audit-log/
We really look forward to helping you.
Hello,
I have updated the sensitive data as requested. Can you please check further?
Thank you.
Your support on the WordPress Forum has helped fix the issue.
Here’s a link to the solution:
https://wordpress.org/support/topic/month-archive-link-redirects-to-homepage-after-installing-plugin/
Turns out I had to enable Date Archives in: WP Dashboard > Rank Math > Titles & Meta > Misc Pages > Date Archives
Hello,
We’re glad that you got that sorted.
If you do have another question in the future, please feel free to create a new forum topic, and it will be our pleasure to assist you again.
Thank you.