Great, it looks like whatever they changed in Chrome no longer trusts Kitten’s¹ local certificate authority (installed and trusted by the system trust store, as you’d do in a *spit* enterprise).
Applies to previously trusted and working certificates too.
(The directly related module is Auto Encrypt Localhost²)
Going to look into it today and see if I can’t find a workaround.
FFS…
¹ https://codeberg.org/kitten/app
² https://codeberg.org/small-tech/auto-encrypt-localhost