Per #511 and #464 it looks like this has happened a few times before.
The Lets Encrypt certificate for the KeyDB Community site has expired.
community.keydb.dev normally uses encryption to protect your information. When Chrome tried to connect to community.keydb.dev this time, the website sent back unusual and incorrect credentials. This may happen when an attacker is trying to pretend to be community.keydb.dev, or a Wi-Fi sign-in screen has interrupted the connection. Your information is still secure because Chrome stopped the connection before any data was exchanged.
You cannot visit community.keydb.dev right now because the website uses HSTS. Network errors and attacks are usually temporary, so this page will probably work later.
Per #511 and #464 it looks like this has happened a few times before.
The Lets Encrypt certificate for the KeyDB Community site has expired.