MinimalXPert theme: links not working

Since WordPress 4.4 the MinimalXPert theme used here didn't produce correct links anymore. "Read more" links, clicks on the title, the featured image, search results or catagory links did not work anymore.

Solution: go to the theme's folder or your child theme's folder and find all the_permalink calls which have a parameter to them. (I found some the_permalink(' ') calls.) Remove the parameter (make it the_permalink()) and it works again.