All the sites hosted on the webschuur.com server were offline for some time, due to a faulty DNS setting. The new settings are now propagating over the internet so all should be fine withing 24 hours.
About the author: Bèr Kessels is an experienced webdeveloper with a great passion for technology and Open Source. A golden combination to implement that technology in a good and efficient way. Follow @firstname.lastname@example.org on Mastodon. Or read more about Bèr.