https://security.archlinux.org/log always returns HTTP 500

[yan12125]

$ curl -I https://security.archlinux.org/log
HTTP/2 500
server: nginx
date: Sun, 16 Jun 2024 05:03:50 GMT
content-type: text/html; charset=utf-8
content-length: 2060
permissions-policy: browsing-topics=()
x-frame-options: SAMEORIGIN
x-content-type-options: nosniff
content-security-policy: default-src 'self'; style-src 'self'; font-src 'self'; form-action 'self'
referrer-policy: no-referrer
vary: Cookie
strict-transport-security: max-age=31536000; includeSubdomains; preload

In browsers, a random emoji and "500: Deep Shit" is displayed.