Error in blog categories

Hi

We have an issue in all the page that list posts of the blog
(home page https://www.mailcleaner.net/)
(blog post list: https://www.mailcleaner.net/category/blog/ )

All the categories are completely brocken. Displaying no categories or multiple time the same categories…

When in the blog article (view or edit) the categories are correctly defined

Best regards

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