Hello,
Thank you for contacting the support and sorry for any inconvenience that might have been caused due to that.
Assuming you are using the latest version of all the plugins and the themes (please update if not yet), it would seem like a conflict with one of the plugins or the theme you are using.
To determine that, please follow this troubleshooting guide:
https://rankmath.com/kb/check-plugin-conflicts/
Please let us know if you find the culprit.
Only the site admin would know and your users won’t be affected by this troubleshooting.
Looking forward to helping you.
Tested, even in troubleshooting mode rank math modules won’t activate/deactivate
Hello,
Thank you for the follow up.
Please delete Rank math Suite and re-install it. If it still won’t work, we might need to take a closer look at the settings. Please edit the first post on this ticket and include your WP 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.
I have tried to delete and reinstall but its giving me the same issue
Hello,
Thank you for contacting Rank Math today.
Could you please upgrade our user account role to an administrator so that we can perform some tests on this?
Looking forward to helping you. Thank you.
Hello,
Thank you for contacting Rank Math today.
The page is reporting the following error: Mixed Content: The page at ‘https://xxxx.org/wp-admin/admin.php?page=rank-math’ was loaded over HTTPS, but requested an insecure XMLHttpRequest endpoint ‘http://xxxx.org/wp-json/rankmath/v1/saveModule’. This request has been blocked; the content must be served over HTTPS.
Could you please get in touch with your host about this error?
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.