I managed to solve the problem by simply deleting the actual page and make a new one.
I don’t know what caused that exact page to be like that after the update, but it’s resolved now.
bdbrown, thanks for your quick replies and effort, much appreciated !
Much Obliged for the warm welcome bdbrown !
In Settings > Reading, i have defined as following:
frontpage: “Forside” and Blog Pages: “Nyheder”
As far as im concerned, i am not running any custom page template for my blog, however, I am using a child-theme for the Hueman theme, if that has any influence?
Everything worked fine before I updated to the newest WP version and I haven’t changed anything than simply updating.