Invalid html error with fullscreen-menu-block

Thanks for the nice plugin! While everything works well in the frontend of my website the fullscreen-menu-block (v2.8.0) causes an “invalid html error” in the WP-editor on my website (similar to the issue described in this post). If I repair or delete / replace the block in the editor, the error is gone. But as soon as I reopen the editor it’s back. 🤔 Any ideas on how to possibly solve this?

• This topic was modified 8 months, 4 weeks ago by Rock a Robot!.

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