I created a QR code that is being blocked by the browser due to security issues. It says that the HTTPS certificate couldn't be verified.
The issue is most likely because your DNS provider doesn't have the latest information, and an entry for one of our domains or subdomains is most likely missing.
Please contact your ISP to refresh the DNS entries or, better, change your DNS provider entry in your system or router to Google Public DNS, and the issue will be resolved.
Refer to this article for steps to configure your network settings to use Google Public DNS - https://developers.google.com/speed/public-dns/docs/using