FAQ not showing at all in frontend

Hello

Since a few weeks the FAQ aren’t showing on the Site anymore.
They are still in the backend, inserted als Shortcode.
But simply aren’t shown in the preview or the working site.

I am using Mesmerize Pro Theme and updated to the WP 5.9.
It has been working before, with accordion and customizing the design.

Could you check for compatibility to WP 5.9?
Or is there anything else I could try?

TIA

The page I need help with: [log in to see the link]