Check to be sure that port 22 is enabled before you reload

 https://superuser.com/questions/590600/ufw-is-active-but-not-enabled-why

etting ENABLED=yes in /etc/ufw/ufw.conf did it for me.

$ sudo ufw reload
Firewall not enabled (skipping reload)
$ sudo ufw logging on (showing that @Thomas' solution has no effect for me)
Logging enabled
$ sudo sed -ie 's/ENABLED=no/ENABLED=yes/' /etc/ufw/ufw.conf

Check to be sure that port 22 is enabled before you reload

$ sudo ufw status
Status: active

To                         Action      From
--                         ------      ----
22/tcp                     ALLOW       Anywhere                  

Reload

$ sudo ufw reload
Firewall reloaded