Register a client with foreman-proxy and install puppet. To sign the cert, navigate to Infrastructure -> Capsules -> select external foreman-proxy -> puppet CA tab.

UI raises error: Undefined method `enabled' for #

2018-04-16T06:22:23 [I|app|] Started GET "/katello/api/capsules/2-capsule-example-com/content/sync?organization_id=1" for 125.16.97.121 at 2018-04-16 06:22:23 -0400
2018-04-16T06:22:23 [I|app|b266f] Processing by Katello::Api::V2::CapsuleContentController#sync_status as JSON
2018-04-16T06:22:23 [I|app|b266f]   Parameters: {"organization_id"=>"1", "api_version"=>"v2", "id"=>"2-capsule-example-com"}
2018-04-16T06:22:23 [I|app|b266f] Current user: admin (administrator)
2018-04-16T06:22:23 [I|app|b266f]   Rendering /opt/theforeman/tfm/root/usr/share/gems/gems/katello-3.7.0/app/views/katello/api/v2/capsule_content/sync_status.json.rabl
2018-04-16T06:22:24 [I|app|b266f]   Rendered /opt/theforeman/tfm/root/usr/share/gems/gems/katello-3.7.0/app/views/katello/api/v2/capsule_content/sync_status.json.rabl (206.9ms)
2018-04-16T06:22:24 [E|app|b266f] ActionView::Template::Error: undefined method `enabled' for #<Array:0x00007fde69901100>
 | (eval):40:in `block (3 levels) in eval_source'
 | /opt/theforeman/tfm-ror51/root/usr/share/gems/gems/activerecord-5.1.4/lib/active_record/relation/delegation.rb:39:in `each'
 | /opt/theforeman/tfm-ror51/root/usr/share/gems/gems/activerecord-5.1.4/lib/active_record/relation/delegation.rb:39:in `each'
 | (eval):31:in `map'
 | (eval):31:in `block (2 levels) in eval_source'
 | /opt/theforeman/tfm/root/usr/share/gems/gems/rabl-0.13.1/lib/rabl/builder.rb:152:in `node'
 | /opt/theforeman/tfm/root/usr/share/gems/gems/rabl-0.13.1/lib/rabl/builder.rb:114:in `block in compile_settings'
 | /opt/theforeman/tfm/root/usr/share/gems/gems/rabl-0.13.1/lib/rabl/builder.rb:113:in `each'
 | /opt/theforeman/tfm/root/usr/share/gems/gems/rabl-0.13.1/lib/rabl/builder.rb:113:in `compile_settings'
 | /opt/theforeman/tfm/root/usr/share/gems/gems/rabl-0.13.1/lib/rabl/builder.rb:58:in `block in to_hash'
 | /opt/theforeman/tfm/root/usr/share/gems/gems/rabl-0.13.1/lib/rabl/builder.rb:248:in `cache_results'
 | /opt/theforeman/tfm/root/usr/share/gems/gems/rabl-0.13.1/lib/rabl/builder.rb:49:in `to_hash'
 | /opt/theforeman/tfm/root/usr/share/gems/gems/rabl-0.13.1/lib/rabl/multi_builder.rb:27:in `map'
 | /opt/theforeman/tfm/root/usr/share/gems/gems/rabl-0.13.1/lib/rabl/multi_builder.rb:27:in `to_a'

reproduced with:

foreman-proxy-1.18.0-0.develop.201804051139gitaaaa773.el7.noarch
foreman-selinux-1.18.0-0.develop.201804021016git128e06f.el7.noarch
tfm-rubygem-foreman_openscap-0.9.0-1.fm1_18.el7.noarch
foreman-libvirt-1.18.0-0.develop.201804051543gitc07e531.el7.noarch
foreman-release-scl-4-1.el7.noarch
foreman-installer-1.18.0-0.develop.201804050328gitc9bede9.el7.noarch