Warning: Potential Security Risk Ahead
Firefox detected a potential security threat and did not continue to nilsbakker.nl. If you visit this site, attackers could try to steal information like your passwords, emails, or credit card details.
And:
$ curl https://nilsbakker.nl/portfolio/3d-tiles/ curl: (60) SSL certificate problem: self-signed certificate More details here: https://curl.se/docs/sslcerts.html
curl failed to verify the legitimacy of the server and therefore could not establish a secure connection to it. To learn more about this situation and how to fix it, please visit the web page mentioned above. (hf-course-3.9.13)