This is known when you have IPT_MODULES set in /etc/default/ufw, which is the default in Ubuntu. You can get rid of the messages by using this in /etc/default/ufw:
IPT_MODULES=
I'm working on a new ufw update that will do this by default and add additional functionality to properly use netfilter helpers rather than the deprecated method currently used by ufw. Note, by unsetting IPT_MODULES, you may break connection tracking when using protocols that require them.
This is known when you have IPT_MODULES set in /etc/default/ufw, which is the default in Ubuntu. You can get rid of the messages by using this in /etc/default/ufw:
IPT_MODULES=
I'm working on a new ufw update that will do this by default and add additional functionality to properly use netfilter helpers rather than the deprecated method currently used by ufw. Note, by unsetting IPT_MODULES, you may break connection tracking when using protocols that require them.