Where can I download latest stable FB software?

[fefekrzr]

Did all this happen immediately after the installation? Did it happen after an update?

This is a wild guess, but if you were updating, you might be running into this issue:

Debian 12 upgrade: The most likely issue you are having is the firewalld configuration

Given the recent surge of reports pertaining to problems experienced during the FreedomBox upgrade to Debian 12, a common pattern seems to be emerging. The main issue appears to stem from changes made to the /etc/firewalld/firewalld.conf file during the upgrade process. If you’re currently facing difficulties with your upgrade, please first verify the state of this particular file. Please, follow the suggestion made by @Avron in this previous post: