Hello!
airvpn.dev is a web site aimed to maximum "web security" for maximum rating on SSL Labs without compromises (for example only TLS 1.3 and 1.2 are allowed and only the strongest cipher suites can be negotiated). As a result several Operating Systems can't even access that web site that remains essentially an exercise. https://www.ssllabs.com/ssltest/analyze.html?d=airvpn.dev&s=95.211.138.143
It is debatable whether re-direction from a web site to another through links published in a forum is safe or not with a specific warning. In our production web sites we allow linking, and we publish a warning before proceeding when a user clicks an URL. In airvpn.dev such operation is currently not allowed.
If you want to be re-directed from airvpn.dev to an external web site, copy and paste the URL on your browser.
Kind regards