Uploading a patch that was tested with 6.4 for this issue.  Note, this is NOT a final solution.  The current issue is that only one plugin can add extensions to the host object within apipie.  This patch makes it so that katello is the one adding extensions at the expense of the openscap plugin.


After applying this patch, simply run "foreman-rake apipie:cache"


diff --git a/lib/katello/engine.rb b/lib/katello/engine.rb
index 260fc3d1d4..5ee5574417 100644
--- a/lib/katello/engine.rb
+++ b/lib/katello/engine.rb
@@ -55,7 +55,7 @@ module Katello
 
     # make sure the Katello plugin is initialized before `after_initialize`
     # hook so that the resumed Dynflow tasks can rely on everything ready.
-    initializer 'katello.register_plugin', :before => :finisher_hook do
+    initializer 'katello.register_plugin', :before => 'foreman_openscap.register_plugin' do
       require 'katello/plugin'
       # extend builtin permissions from core with new actions
       require 'katello/permissions'

It turns out this has been resolved upstream this past month.  Adding the 3 upstream issues.

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHSA-2019:1222