There seems to be a workaround here: Foreman Proxy won't start due to ruby load error (Concurrent::Edge::Future)
It links to the following issue: Bug #25716: Foreman-proxy is missing ruby-logging dependency - Packaging - Foreman
There seems to be a workaround here: Foreman Proxy won't start due to ruby load error (Concurrent::Edge::Future)
It links to the following issue: Bug #25716: Foreman-proxy is missing ruby-logging dependency - Packaging - Foreman