Processing triggers for systemd (229-4ubuntu4) ...
dpkg: dependency problems prevent processing triggers for ufw:
 ufw depends on ucf; however:
  Package ucf is not configured yet.
 ufw depends on python3; however:
  Package python3 is not configured yet.
 ufw depends on python3:any (>= 3.3.2-2~); however:
  Package python3 is not configured yet.

dpkg: error processing archive /var/cache/apt/archives/squid3_3.5.12-1ubuntu7_all.deb (--unpack):
 dependency problems - leaving triggers unprocessed