Error when inserting in Gutenberg

Suddenly, when I want to add the widget to any type of page or post, I get an error stating “The block has hit an error and can’t be shown”. Also there is no settings on the right. All of the exsisting blocks on the site work fine, but when trying to add new ones (or duplicate existing ones) I get the error.

https://capture.dropbox.com/AfOeYQObOrbMo37P

The site is behind login so you’ll need credentials if you want to see what’s up. I obviously tried deactivating all other plugins.

Looking forward to hearing from you.

Best Jesper