Do not look at your AnyNews snippet, look at the "Nieuws" page for the problem.
Could it be that your "nieuws" page is set to a different (not existing) template?
It now opens the newscontent without any template.
When the item is opened, and you click "Terug" it should show a news overview page. This one is also without the template.
If nothing works, maybe you should try to delete the nieuws page, and make a new one with all default settings.