It seems like Cloudflare moved us to a server that does not support TLSv1.1 (which is the only TLS the Vita supports) and so
https://henkaku.xyz is now broken. You should use
http://henkaku.xyz instead.
If you visited the https site in the last month though, you will be automatically redirected to the https site due to HSTS. In that case, you need to reset your Vita's HSTS database. To do that:
- In the web browser, tap the "..." button on the bottom right corner.
- Choose Settings
- Choose Delete Cookies
- Tap Yes
You should be able to visit
http://henkaku.xyz now.