Hello,
Thank you for contacting the support and sorry for any inconvenience that might have been caused due to that.
Is it webinar a page or custom post type? Also, would you please share the affected URLs so that we can investigate on the issue further.
Looking forward to helping you.
Hello,
In this case, 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.
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.
Hello,
I have updated the sensitive data as requested. Can you please check further?
Thank you.
Hello,
The following URLs are actually your Webinar Categories and the option Include in Sitemap for your Webinar Categories was disabled.
webinare/business-karriere/
webinare/content-marketing/
webinare/digital-marketing/
webinare/marketing-strategie/
webinare/social-media-marketing/
webinare/suchmaschinenmarketing/
We’ve enabled the option from Rank Math > Sitemap Settings > Webinar Categories and now these URLs are appearing under your webinar-categories-sitemap.xml:

Regarding the webinare/%webinar-categories%/ URL on your sitemap, please try to follow the steps below and see if that works for you:
1. Flush the Sitemap cache by following this video screencast:
https://i.rankmath.com/pipRDp
2. Exclude the Sitemap files of the Rank Math plugin in your caching plugin. The cache could be via a plugin or from the server. For plugins or Cloudflare, please follow this article:
https://rankmath.com/kb/exclude-sitemaps-from-caching/
3. If the above steps don’t seem to work, kindly apply the following filter to your site.
add_filter( 'rank_math/sitemap/enable_caching', '__return_false');
Here’s how you can add filter/hook to your WordPress site:
https://rankmath.com/kb/wordpress-hooks-actions-filters/
Let us know how it goes. 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.