Hello,
Thank you for contacting Rank Math, and sorry for any inconvenience that might have been caused due to that.
Are you getting any error when you save?
It could be a conflict between Rank Math and one of your installed plugins.
To determine that, please follow this troubleshooting guide:
https://rankmath.com/kb/check-plugin-conflicts/
Try enabling only Rank Math, then check if the function is working. Then try enabling each plugin one by one until you found the conflicting plugin.
Enable the default WordPress theme to test as well.
You can use Chrome’s developer tool and use the console to see what error you are getting when hitting the save button. This will help identify your issues.
I hope this helps you with your issue.
Thanks for your reply.
The “Strip Category Base” is successfully turned on now.
But the /category/ still show in my URL.
Hello,
We might need to take a closer look at the settings. Please edit the first post on this ticket and include your WordPress & FTP 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,
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.