Hello,
Thank you for your query, and we are so sorry about the trouble this must have caused.
We appreciate your perspective and acknowledge that you haven’t previously encountered firewall issues, particularly given that these processes worked as expected on your colleague’s laptop.
However, if you’re noticing that your metadata and focus keyword isn’t updating as it should, the initial troubleshooting step involves confirming whether a firewall could be inadvertently blocking the saving of changes.
Please whitelist these routes:
/wp-json/rankmath/v1/updateMeta
/wp-json/rankmath/v1/updateSchemas
/wp-json/rankmath/v1/updateRedirection
/wp-json/rankmath/v1/getFeaturedImageId
/wp-json/rankmath/v1/getHead
You can check this link for more information:
https://rankmath.com/kb/meta-data-not-saving/
Additionally, once you’ve ensured the routes mentioned are whitelisted and you have tried everything from the above KB, we kindly request that you allow us to take a closer look at the settings.
For us to take a closer look, please edit the first post on this ticket and include your WordPress & FTP logins in the designated Sensitive Data section.
Please do take a complete backup of your website before sharing the information with us.

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.
Thank you.