Login may break soon
Opening the login page with the Firefox console prints this message:
Cookie “dancer.session” will be soon rejected because it has the “SameSite” attribute set to “None” or an invalid value, without the “secure” attribute. To know more about the “SameSite“ attribute, read https://developer.mozilla.org/docs/Web/HTTP/Headers/Set-Cookie/SameSite
Chances are this will be fixed upstream and Debian would backport the patch, but it would be nice to check that.