Instant Indexing is showing an error: Error undefined

Hello,

Assuming you are using the latest version of all the plugins and the themes (please update if not yet), there may be a theme/plugin conflict preventing the Instant Indexing API from functioning correctly.

To determine that, please follow this troubleshooting guide:
https://rankmath.com/kb/check-plugin-conflicts/

Here is a video you can follow as well: https://www.youtube.com/watch?v=FcIWRhcUP2c

Only the site admin would know and your users won’t be affected by this troubleshooting.

If the issue persists, please record a video screencast using a tool like Loom showing the troubleshooting and 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/

Please do take a complete backup of your website before sharing the information with us.

We really look forward to helping you.

Hello @বিশ্বজিৎ কর্মকার,

5xx errors are usually caused due to server misconfiguration or other server issues.

Can you please share the error log with us?

Having the error log file will give a clear idea of why this might be happening.

You can follow this guide to enable debugging in WordPress
https://wordpress.org/support/article/debugging-in-wordpress/ or you can get in touch with your web host, they will help you locate the log file.

@Wahid, please open a new ticket and share the error log there so we can check.

Looking forward to helping you.