Fa Icons doesn't show on hustle popup

There was this error in the console:

“Access to CSS stylesheet at ‘https://hb.wpmucdn.com/web****.de/2057a1e7-65a9-4c4b-8785-.css’ from origin ‘https://web****.de’ has been blocked by CORS policy: No ‘Access-Control-Allow-Origin’ header is present on the requested resource.”

It was resolved on the chat but the Hustle popup still doesn’t show the fa icons.

The issue can be seen at https://web*****.de/tarife/ by clicking + Alle Full Service Features anzeigen.