Widgets Can’t BE Modified With "Blocks"

Hello dear Xtemos team.

I have one question:

Since the last update of WordPress, the “BLOCKS LAYOUT” has been introduced for editing the widgets in WP-Dashboard. Unfortunately, this does not work for me / the theme to edit my existing widgets in the Shop Page Widget Area or add new ones.

> I get error messages (red stripes/messages > top of the screeshot)
> blocks for editing just don’t load (no content will shown)

> I have already installed the “Classic Editior Plugin“ – without success. It remains unfortunately this new empty white “BLOCKS LAYOUT” view.

What can I do and how can I edit my widgets under these circumstances?

Thanks for any ideas.

Best regards,
Steffi