Hello,
We apologize for any trouble you might be facing due to this issue.
There’s a possibility that the cause of this issue is a conflict with another plugin or your theme. To find out which one is causing the problem, you need to do some troubleshooting steps. Don’t worry, it’s not hard and it won’t affect your visitors.
Here’s what you need to do:
If the issue is still there:
Before you share any information with us, please make sure you have a full backup of your website. This is very important in case something goes wrong.
We look forward to helping you troubleshoot this issue.
I already check with the plugins conflict and still the same.
The issue only occur on the other site of multi-site, so I have 3 multi-site with /en the main one and its working fine no error but for the others site its have that error.
Is the plugin cannot allow that feature on multi site because now I still using the free version.
Hello,
Thank you for getting back to us.
To help you investigate this issue, we might need to take a closer look at your website and settings. Please follow these steps:
- Edit the first post on this ticket and include your WordPress and FTP logins in the Sensitive Data section. This is a secure section that only our support staff can access.

- Make sure you take a complete backup of your website before sharing the information with us.
- If you prefer, you can use this 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 also use this plugin to monitor what changes our staff might make on your website (if any): https://wordpress.org/plugins/wp-security-audit-log/
We appreciate your cooperation and patience. Thank you for choosing Rank Math.
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.