$concat_basedir not defined

Hi group,

Ive just upgrade to 1.6 version and when i run this command:

foreman-installer --noop --dont-save-answers --verbose

I got this message:

$concat_basedir not defined. Try running again with pluginsync=true on the
[master] and/or [main] section of your node's '/etc/puppet/puppet.conf'. at
/usr/share/foreman-installer/modules/concat/manifests/setup.pp:20 on node

Ive also update my puppet conf about the environment for the 3.7.6 puppet
version. Anyone know anything about this?¿ is it a bug?¿