There does not seem to be any reason for afzethekken.nl to be blocked. I've checked some sources, and everything looks green:
https://www.virustotal.com/gui/url/c8b95f2a965242c320461cffc2179b496e4f72499842b4cda12da3b2c30248ff/detection
https://sitecheck.sucuri.net/results/https/afzethekken.nl
https://transparencyreport.google.com/safe-browsing/search?url=https:%2F%2Fafzethekken.nl%2F&hl=en
Can you tell me why this is happening?
In the screenshot, the domain name is in the url parameter in the address bar.