I believe this is the full stack trace from the attempt to run the puppet agent on the foreman master:
2020-06-18T11:55:17 [I|app|11e7e7c3] Started GET "/node/puppetmaster03.hcilabs.hpecorp.net?format=yml" for 16.100.202.19 at 2020-06-18 11:55:17 -0400
2020-06-18T11:55:17 [I|app|11e7e7c3] Processing by HostsController#externalNodes as YML
2020-06-18T11:55:17 [I|app|11e7e7c3] Parameters: {"name"=>"puppetmaster03.hcilabs.hpecorp.net"}
2020-06-18T11:55:17 [D|app|11e7e7c3] Examining client certificate to extract dn and sans
2020-06-18T11:55:17 [D|app|11e7e7c3] Client sent certificate with subject 'puppetmaster03.hcilabs.hpecorp.net' and subject alt names '["puppetmaster03.hcilabs.hpecorp.net"]'
2020-06-18T11:55:17 [D|app|11e7e7c3] Verifying request from ["puppetmaster03.hcilabs.hpecorp.net"] against ["puppetmaster03.hcilabs.hpecorp.net"]
2020-06-18T11:55:17 [W|app|11e7e7c3] Failed to generate external nodes for puppetmaster03.hcilabs.hpecorp.net
2020-06-18T11:55:17 [D|app|11e7e7c3] Backtrace for 'Failed to generate external nodes for puppetmaster03.hcilabs.hpecorp.net' error (NoMethodError): undefined method `enabled_taxonomies' for #<Class:0x000000000b628f30>
Did you mean? enable_auditing
/opt/theforeman/tfm-ror52/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/dynamic_matchers.rb:22:in `method_missing'
/opt/theforeman/tfm/root/usr/share/gems/gems/foreman_remote_execution-1.8.2/app/models/concerns/foreman_remote_execution/host_extensions.rb:74:in `remote_execution_proxies'
/opt/theforeman/tfm/root/usr/share/gems/gems/foreman_remote_execution-1.8.2/app/models/concerns/foreman_remote_execution/host_extensions.rb:88:in `remote_execution_ssh_keys'
/opt/theforeman/tfm/root/usr/share/gems/gems/foreman_remote_execution-1.8.2/app/models/concerns/foreman_remote_execution/host_extensions.rb:50:in `host_params_hash'
/usr/share/foreman/app/models/concerns/host_params.rb:54:in `host_params'
/usr/share/foreman/app/models/concerns/host_params.rb:11:in `params'
/usr/share/foreman/app/models/host_info_providers/host_params_info.rb:4:in `host_info'
/usr/share/foreman/app/models/concerns/host_info_extensions.rb:29:in `block in info'
/usr/share/foreman/app/models/concerns/host_info_extensions.rb:27:in `each'
/usr/share/foreman/app/models/concerns/host_info_extensions.rb:27:in `info'
/usr/share/foreman/app/controllers/hosts_controller.rb:199:in `block in externalNodes'
/opt/theforeman/tfm-ror52/root/usr/share/gems/gems/actionpack-5.2.1/lib/action_controller/metal/mime_responds.rb:197:in `respond_to'
/usr/share/foreman/app/controllers/hosts_controller.rb:195:in `externalNodes'
/opt/theforeman/tfm-ror52/root/usr/share/gems/gems/actionpack-5.2.1/lib/action_controller/metal/basic_implicit_render.rb:6:in `send_action'
/opt/theforeman/tfm-ror52/root/usr/share/gems/gems/actionpack-5.2.1/lib/abstract_controller/base.rb:194:in `process_action'
/opt/theforeman/tfm-ror52/root/usr/share/gems/gems/actionpack-5.2.1/lib/action_controller/metal/rendering.rb:30:in `process_action'
/opt/theforeman/tfm-ror52/root/usr/share/gems/gems/actionpack-5.2.1/lib/abstract_controller/callbacks.rb:42:in `block in process_action'
/opt/theforeman/tfm-ror52/root/usr/share/gems/gems/activesupport-5.2.1/lib/active_support/callbacks.rb:109:in `block in run_callbacks'
/usr/share/foreman/app/controllers/concerns/foreman/controller/timezone.rb:10:in `set_timezone'
/opt/theforeman/tfm-ror52/root/usr/share/gems/gems/activesupport-5.2.1/lib/active_support/callbacks.rb:118:in `block in run_callbacks'
/usr/share/foreman/app/models/concerns/foreman/thread_session.rb:32:in `clear_thread'
/opt/theforeman/tfm-ror52/root/usr/share/gems/gems/activesupport-5.2.1/lib/active_support/callbacks.rb:118:in `block in run_callbacks'
/usr/share/foreman/app/controllers/concerns/foreman/controller/topbar_sweeper.rb:12:in `set_topbar_sweeper_controller'
/opt/theforeman/tfm-ror52/root/usr/share/gems/gems/activesupport-5.2.1/lib/active_support/callbacks.rb:118:in `block in run_callbacks'
/opt/theforeman/tfm/root/usr/share/gems/gems/audited-4.9.0/lib/audited/sweeper.rb:14:in `around'
/opt/theforeman/tfm-ror52/root/usr/share/gems/gems/activesupport-5.2.1/lib/active_support/callbacks.rb:118:in `block in run_callbacks'
/opt/theforeman/tfm/root/usr/share/gems/gems/audited-4.9.0/lib/audited/sweeper.rb:14:in `around'
/opt/theforeman/tfm-ror52/root/usr/share/gems/gems/activesupport-5.2.1/lib/active_support/callbacks.rb:118:in `block in run_callbacks'
/opt/theforeman/tfm-ror52/root/usr/share/gems/gems/activesupport-5.2.1/lib/active_support/callbacks.rb:136:in `run_callbacks'
/opt/theforeman/tfm-ror52/root/usr/share/gems/gems/actionpack-5.2.1/lib/abstract_controller/callbacks.rb:41:in `process_action'
/opt/theforeman/tfm-ror52/root/usr/share/gems/gems/actionpack-5.2.1/lib/action_controller/metal/rescue.rb:22:in `process_action'
/opt/theforeman/tfm-ror52/root/usr/share/gems/gems/actionpack-5.2.1/lib/action_controller/metal/instrumentation.rb:34:in `block in process_action'
/opt/theforeman/tfm-ror52/root/usr/share/gems/gems/activesupport-5.2.1/lib/active_support/notifications.rb:168:in `block in instrument'
/opt/theforeman/tfm-ror52/root/usr/share/gems/gems/activesupport-5.2.1/lib/active_support/notifications/instrumenter.rb:23:in `instrument'
/opt/theforeman/tfm-ror52/root/usr/share/gems/gems/activesupport-5.2.1/lib/active_support/notifications.rb:168:in `instrument'
/opt/theforeman/tfm-ror52/root/usr/share/gems/gems/actionpack-5.2.1/lib/action_controller/metal/instrumentation.rb:32:in `process_action'
/opt/theforeman/tfm-ror52/root/usr/share/gems/gems/actionpack-5.2.1/lib/action_controller/metal/params_wrapper.rb:256:in `process_action'
/opt/theforeman/tfm-ror52/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/railties/controller_runtime.rb:24:in `process_action'
/opt/theforeman/tfm-ror52/root/usr/share/gems/gems/actionpack-5.2.1/lib/abstract_controller/base.rb:134:in `process'
/opt/theforeman/tfm-ror52/root/usr/share/gems/gems/actionview-5.2.1/lib/action_view/rendering.rb:32:in `process'
/opt/theforeman/tfm-ror52/root/usr/share/gems/gems/actionpack-5.2.1/lib/action_controller/metal.rb:191:in `dispatch'
/opt/theforeman/tfm-ror52/root/usr/share/gems/gems/actionpack-5.2.1/lib/action_controller/metal.rb:252:in `dispatch'
/opt/theforeman/tfm-ror52/root/usr/share/gems/gems/actionpack-5.2.1/lib/action_dispatch/routing/route_set.rb:52:in `dispatch'
/opt/theforeman/tfm-ror52/root/usr/share/gems/gems/actionpack-5.2.1/lib/action_dispatch/routing/route_set.rb:34:in `serve'
/opt/theforeman/tfm-ror52/root/usr/share/gems/gems/actionpack-5.2.1/lib/action_dispatch/journey/router.rb:52:in `block in serve'
/opt/theforeman/tfm-ror52/root/usr/share/gems/gems/actionpack-5.2.1/lib/action_dispatch/journey/router.rb:35:in `each'
/opt/theforeman/tfm-ror52/root/usr/share/gems/gems/actionpack-5.2.1/lib/action_dispatch/journey/router.rb:35:in `serve'
/opt/theforeman/tfm-ror52/root/usr/share/gems/gems/actionpack-5.2.1/lib/action_dispatch/routing/route_set.rb:840:in `call'
/opt/rh/rh-ruby25/root/usr/local/share/gems/gems/newrelic_rpm-6.2.0.354/lib/new_relic/agent/instrumentation/middleware_tracing.rb:99:in `call'
/opt/theforeman/tfm/root/usr/share/gems/gems/apipie-rails-0.5.14/lib/apipie/static_dispatcher.rb:65:in `call'
/opt/rh/rh-ruby25/root/usr/local/share/gems/gems/newrelic_rpm-6.2.0.354/lib/new_relic/agent/instrumentation/middleware_tracing.rb:99:in `call'
/opt/rh/rh-ruby25/root/usr/local/share/gems/gems/newrelic_rpm-6.2.0.354/lib/new_relic/rack/agent_hooks.rb:30:in `traced_call'
/opt/rh/rh-ruby25/root/usr/local/share/gems/gems/newrelic_rpm-6.2.0.354/lib/new_relic/agent/instrumentation/middleware_tracing.rb:99:in `call'
/opt/rh/rh-ruby25/root/usr/local/share/gems/gems/newrelic_rpm-6.2.0.354/lib/new_relic/rack/browser_monitoring.rb:32:in `traced_call'
/opt/rh/rh-ruby25/root/usr/local/share/gems/gems/newrelic_rpm-6.2.0.354/lib/new_relic/agent/instrumentation/middleware_tracing.rb:99:in `call'
/opt/theforeman/tfm/root/usr/share/gems/gems/apipie-rails-0.5.14/lib/apipie/extractor/recorder.rb:137:in `call'
/opt/rh/rh-ruby25/root/usr/local/share/gems/gems/newrelic_rpm-6.2.0.354/lib/new_relic/agent/instrumentation/middleware_tracing.rb:99:in `call'
/opt/theforeman/tfm-ror52/root/usr/share/gems/gems/actionpack-5.2.1/lib/action_dispatch/middleware/static.rb:127:in `call'
/opt/rh/rh-ruby25/root/usr/local/share/gems/gems/newrelic_rpm-6.2.0.354/lib/new_relic/agent/instrumentation/middleware_tracing.rb:99:in `call'
/opt/theforeman/tfm-ror52/root/usr/share/gems/gems/actionpack-5.2.1/lib/action_dispatch/middleware/static.rb:127:in `call'
/opt/rh/rh-ruby25/root/usr/local/share/gems/gems/newrelic_rpm-6.2.0.354/lib/new_relic/agent/instrumentation/middleware_tracing.rb:99:in `call'
/opt/theforeman/tfm-ror52/root/usr/share/gems/gems/actionpack-5.2.1/lib/action_dispatch/middleware/static.rb:127:in `call'
/opt/rh/rh-ruby25/root/usr/local/share/gems/gems/newrelic_rpm-6.2.0.354/lib/new_relic/agent/instrumentation/middleware_tracing.rb:99:in `call'
/opt/theforeman/tfm-ror52/root/usr/share/gems/gems/actionpack-5.2.1/lib/action_dispatch/middleware/static.rb:127:in `call'
/opt/rh/rh-ruby25/root/usr/local/share/gems/gems/newrelic_rpm-6.2.0.354/lib/new_relic/agent/instrumentation/middleware_tracing.rb:99:in `call'
/usr/share/foreman/lib/foreman/middleware/telemetry.rb:10:in `call'
/opt/rh/rh-ruby25/root/usr/local/share/gems/gems/newrelic_rpm-6.2.0.354/lib/new_relic/agent/instrumentation/middleware_tracing.rb:99:in `call'
/opt/theforeman/tfm/root/usr/share/gems/gems/apipie-rails-0.5.14/lib/apipie/middleware/checksum_in_headers.rb:27:in `call'
/opt/rh/rh-ruby25/root/usr/local/share/gems/gems/newrelic_rpm-6.2.0.354/lib/new_relic/agent/instrumentation/middleware_tracing.rb:99:in `call'
/usr/share/foreman/lib/foreman/middleware/catch_json_parse_errors.rb:9:in `call'
/opt/rh/rh-ruby25/root/usr/local/share/gems/gems/newrelic_rpm-6.2.0.354/lib/new_relic/agent/instrumentation/middleware_tracing.rb:99:in `call'
/opt/theforeman/tfm-ror52/root/usr/share/gems/gems/rack-2.0.6/lib/rack/tempfile_reaper.rb:15:in `call'
/opt/rh/rh-ruby25/root/usr/local/share/gems/gems/newrelic_rpm-6.2.0.354/lib/new_relic/agent/instrumentation/middleware_tracing.rb:99:in `call'
/opt/theforeman/tfm-ror52/root/usr/share/gems/gems/rack-2.0.6/lib/rack/etag.rb:25:in `call'
/opt/rh/rh-ruby25/root/usr/local/share/gems/gems/newrelic_rpm-6.2.0.354/lib/new_relic/agent/instrumentation/middleware_tracing.rb:99:in `call'
/opt/theforeman/tfm-ror52/root/usr/share/gems/gems/rack-2.0.6/lib/rack/conditional_get.rb:25:in `call'
/opt/rh/rh-ruby25/root/usr/local/share/gems/gems/newrelic_rpm-6.2.0.354/lib/new_relic/agent/instrumentation/middleware_tracing.rb:99:in `call'
/opt/theforeman/tfm-ror52/root/usr/share/gems/gems/rack-2.0.6/lib/rack/head.rb:12:in `call'
/opt/rh/rh-ruby25/root/usr/local/share/gems/gems/newrelic_rpm-6.2.0.354/lib/new_relic/agent/instrumentation/middleware_tracing.rb:99:in `call'
/opt/theforeman/tfm-ror52/root/usr/share/gems/gems/actionpack-5.2.1/lib/action_dispatch/http/content_security_policy.rb:18:in `call'
/opt/rh/rh-ruby25/root/usr/local/share/gems/gems/newrelic_rpm-6.2.0.354/lib/new_relic/agent/instrumentation/middleware_tracing.rb:99:in `call'
/usr/share/foreman/lib/foreman/middleware/logging_context_session.rb:22:in `call'
/opt/rh/rh-ruby25/root/usr/local/share/gems/gems/newrelic_rpm-6.2.0.354/lib/new_relic/agent/instrumentation/middleware_tracing.rb:99:in `call'
/opt/theforeman/tfm-ror52/root/usr/share/gems/gems/rack-2.0.6/lib/rack/session/abstract/id.rb:232:in `context'
/opt/theforeman/tfm-ror52/root/usr/share/gems/gems/rack-2.0.6/lib/rack/session/abstract/id.rb:226:in `call'
/opt/rh/rh-ruby25/root/usr/local/share/gems/gems/newrelic_rpm-6.2.0.354/lib/new_relic/agent/instrumentation/middleware_tracing.rb:99:in `call'
/opt/theforeman/tfm-ror52/root/usr/share/gems/gems/actionpack-5.2.1/lib/action_dispatch/middleware/cookies.rb:670:in `call'
/opt/rh/rh-ruby25/root/usr/local/share/gems/gems/newrelic_rpm-6.2.0.354/lib/new_relic/agent/instrumentation/middleware_tracing.rb:99:in `call'
/opt/theforeman/tfm-ror52/root/usr/share/gems/gems/actionpack-5.2.1/lib/action_dispatch/middleware/callbacks.rb:28:in `block in call'
/opt/theforeman/tfm-ror52/root/usr/share/gems/gems/activesupport-5.2.1/lib/active_support/callbacks.rb:98:in `run_callbacks'
/opt/theforeman/tfm-ror52/root/usr/share/gems/gems/actionpack-5.2.1/lib/action_dispatch/middleware/callbacks.rb:26:in `call'
/opt/rh/rh-ruby25/root/usr/local/share/gems/gems/newrelic_rpm-6.2.0.354/lib/new_relic/agent/instrumentation/middleware_tracing.rb:99:in `call'
/opt/theforeman/tfm-ror52/root/usr/share/gems/gems/actionpack-5.2.1/lib/action_dispatch/middleware/debug_exceptions.rb:61:in `call'
/opt/rh/rh-ruby25/root/usr/local/share/gems/gems/newrelic_rpm-6.2.0.354/lib/new_relic/agent/instrumentation/middleware_tracing.rb:99:in `call'
/opt/theforeman/tfm-ror52/root/usr/share/gems/gems/actionpack-5.2.1/lib/action_dispatch/middleware/show_exceptions.rb:33:in `call'
/opt/rh/rh-ruby25/root/usr/local/share/gems/gems/newrelic_rpm-6.2.0.354/lib/new_relic/agent/instrumentation/middleware_tracing.rb:99:in `call'
/opt/theforeman/tfm-ror52/root/usr/share/gems/gems/railties-5.2.1/lib/rails/rack/logger.rb:38:in `call_app'
/opt/theforeman/tfm-ror52/root/usr/share/gems/gems/railties-5.2.1/lib/rails/rack/logger.rb:28:in `call'
/opt/rh/rh-ruby25/root/usr/local/share/gems/gems/newrelic_rpm-6.2.0.354/lib/new_relic/agent/instrumentation/middleware_tracing.rb:99:in `call'
/opt/theforeman/tfm-ror52/root/usr/share/gems/gems/sprockets-rails-3.2.1/lib/sprockets/rails/quiet_assets.rb:13:in `call'
/opt/rh/rh-ruby25/root/usr/local/share/gems/gems/newrelic_rpm-6.2.0.354/lib/new_relic/agent/instrumentation/middleware_tracing.rb:99:in `call'
/usr/share/foreman/lib/foreman/middleware/logging_context_request.rb:11:in `call'
/opt/rh/rh-ruby25/root/usr/local/share/gems/gems/newrelic_rpm-6.2.0.354/lib/new_relic/agent/instrumentation/middleware_tracing.rb:99:in `call'
/opt/theforeman/tfm-ror52/root/usr/share/gems/gems/actionpack-5.2.1/lib/action_dispatch/middleware/remote_ip.rb:81:in `call'
/opt/rh/rh-ruby25/root/usr/local/share/gems/gems/newrelic_rpm-6.2.0.354/lib/new_relic/agent/instrumentation/middleware_tracing.rb:99:in `call'
/opt/theforeman/tfm-ror52/root/usr/share/gems/gems/actionpack-5.2.1/lib/action_dispatch/middleware/request_id.rb:27:in `call'
/opt/rh/rh-ruby25/root/usr/local/share/gems/gems/newrelic_rpm-6.2.0.354/lib/new_relic/agent/instrumentation/middleware_tracing.rb:99:in `call'
/opt/theforeman/tfm-ror52/root/usr/share/gems/gems/rack-2.0.6/lib/rack/method_override.rb:22:in `call'
/opt/rh/rh-ruby25/root/usr/local/share/gems/gems/newrelic_rpm-6.2.0.354/lib/new_relic/agent/instrumentation/middleware_tracing.rb:99:in `call'
/opt/theforeman/tfm-ror52/root/usr/share/gems/gems/rack-2.0.6/lib/rack/runtime.rb:22:in `call'
/opt/rh/rh-ruby25/root/usr/local/share/gems/gems/newrelic_rpm-6.2.0.354/lib/new_relic/agent/instrumentation/middleware_tracing.rb:99:in `call'
/opt/theforeman/tfm-ror52/root/usr/share/gems/gems/activesupport-5.2.1/lib/active_support/cache/strategy/local_cache_middleware.rb:29:in `call'
/opt/rh/rh-ruby25/root/usr/local/share/gems/gems/newrelic_rpm-6.2.0.354/lib/new_relic/agent/instrumentation/middleware_tracing.rb:99:in `call'
/opt/theforeman/tfm-ror52/root/usr/share/gems/gems/actionpack-5.2.1/lib/action_dispatch/middleware/executor.rb:14:in `call'
/opt/rh/rh-ruby25/root/usr/local/share/gems/gems/newrelic_rpm-6.2.0.354/lib/new_relic/agent/instrumentation/middleware_tracing.rb:99:in `call'
/opt/theforeman/tfm-ror52/root/usr/share/gems/gems/actionpack-5.2.1/lib/action_dispatch/middleware/static.rb:127:in `call'
/opt/rh/rh-ruby25/root/usr/local/share/gems/gems/newrelic_rpm-6.2.0.354/lib/new_relic/agent/instrumentation/middleware_tracing.rb:99:in `call'
/opt/theforeman/tfm-ror52/root/usr/share/gems/gems/rack-2.0.6/lib/rack/sendfile.rb:111:in `call'
/opt/rh/rh-ruby25/root/usr/local/share/gems/gems/newrelic_rpm-6.2.0.354/lib/new_relic/agent/instrumentation/middleware_tracing.rb:99:in `call'
/opt/theforeman/tfm/root/usr/share/gems/gems/secure_headers-6.3.0/lib/secure_headers/middleware.rb:11:in `call'
/opt/rh/rh-ruby25/root/usr/local/share/gems/gems/newrelic_rpm-6.2.0.354/lib/new_relic/agent/instrumentation/middleware_tracing.rb:99:in `call'
/opt/theforeman/tfm-ror52/root/usr/share/gems/gems/railties-5.2.1/lib/rails/engine.rb:524:in `call'
/opt/theforeman/tfm-ror52/root/usr/share/gems/gems/railties-5.2.1/lib/rails/railtie.rb:190:in `public_send'
/opt/theforeman/tfm-ror52/root/usr/share/gems/gems/railties-5.2.1/lib/rails/railtie.rb:190:in `method_missing'
/opt/rh/rh-ruby25/root/usr/local/share/gems/gems/newrelic_rpm-6.2.0.354/lib/new_relic/agent/instrumentation/middleware_tracing.rb:99:in `call'
/opt/theforeman/tfm-ror52/root/usr/share/gems/gems/rack-2.0.6/lib/rack/urlmap.rb:68:in `block in call'
/opt/theforeman/tfm-ror52/root/usr/share/gems/gems/rack-2.0.6/lib/rack/urlmap.rb:53:in `each'
/opt/theforeman/tfm-ror52/root/usr/share/gems/gems/rack-2.0.6/lib/rack/urlmap.rb:53:in `call'
/usr/share/passenger/phusion_passenger/rack/thread_handler_extension.rb:74:in `process_request'
/usr/share/passenger/phusion_passenger/request_handler/thread_handler.rb:141:in `accept_and_process_next_request'
/usr/share/passenger/phusion_passenger/request_handler/thread_handler.rb:109:in `main_loop'
/usr/share/passenger/phusion_passenger/request_handler.rb:455:in `block (3 levels) in start_threads'
/opt/theforeman/tfm/root/usr/share/gems/gems/logging-2.2.2/lib/logging/diagnostic_context.rb:474:in `block in create_with_logging_context'
2020-06-18T11:55:17 [I|app|11e7e7c3] Rendering text template
2020-06-18T11:55:17 [I|app|11e7e7c3] Rendered text template (0.0ms)
2020-06-18T11:55:17 [I|app|11e7e7c3] Completed 412 Precondition Failed in 165ms (Views: 0.5ms | ActiveRecord: 17.5ms)