Puppet not working

Installation:
RHEL 7.4
Satellite: 6.2.12

I am fairly new so point me in the right direction if documentation exists to help me. :)

I had a working system with puppet pushing things out as expected but while trying to get hiera with variable encryption working (to hold passwords) I managed to break my server and I have not been able to recover.

When I make a simple change to a module updating /etc/issue then run "puppet agent -t" as root on one of the target boxes I do not get the update. The agent runs cleanly, however, it does not appear to notice the change (no changes are applied and no errors/warnings are reported).

I suspect the problem is in the /etc/puppet/puppet.conf on the master, however, I don't have a copy of the working version.