Foreman - Puppet Run Option is not applying the puppet classes on nodes

[ekohl]

The Infra & CI category is not meant for support questions.

As for the answer:

Disabling all modules in the group

Is there anything in /var/log/foreman-proxy/proxy.log? Can you at least confirm Foreman sends the API request to Foreman Proxy? Is it making the SSH connection correctly? Can you see that on the target machine there is a log entry for that? Those are the steps that I would take.