Bug report for additonal kit: “An error has occurred in this block”

Hi,

I like the plugin so far very much, although I did not found until now how to add more then three items to an accordion, but that’s not why I write.

The plugin offers in backend to install “Gutena Kit – Gutenberg Blocks and Templates” – but doing so ends in “An error has occurred in this block and preview is not possible” in backend, all over the site. In code-editor everything is fine, and deactivating the additional kit makes the problem disappear.