Description of problem:

[----] F, [2016-11-07T10:13:31.144398 #44276:124f990] FATAL -- : Error caught: [NoMethodError] undefined method `base_class' for NilClass:Class
/var/www/miq/vmdb/app/presenters/tree_builder_vms_and_templates.rb:100:in `block in sort_tree'
/var/www/miq/vmdb/gems/pending/util/extensions/miq-hash.rb:14:in `each'
/var/www/miq/vmdb/gems/pending/util/extensions/miq-hash.rb:14:in `sort_by'
/var/www/miq/vmdb/gems/pending/util/extensions/miq-hash.rb:14:in `sort_by!'
/var/www/miq/vmdb/app/presenters/tree_builder_vms_and_templates.rb:98:in `sort_tree'
/var/www/miq/vmdb/app/presenters/tree_builder_vms_and_templates.rb:95:in `block in sort_tree'
/var/www/miq/vmdb/app/presenters/tree_builder_vms_and_templates.rb:94:in `each'
/var/www/miq/vmdb/app/presenters/tree_builder_vms_and_templates.rb:94:in `sort_tree'
/var/www/miq/vmdb/app/presenters/tree_builder_vms_and_templates.rb:95:in `block in sort_tree'
/var/www/miq/vmdb/app/presenters/tree_builder_vms_and_templates.rb:94:in `each'
/var/www/miq/vmdb/app/presenters/tree_builder_vms_and_templates.rb:94:in `sort_tree'
/var/www/miq/vmdb/app/presenters/tree_builder_vms_and_templates.rb:95:in `block in sort_tree'
/var/www/miq/vmdb/app/presenters/tree_builder_vms_and_templates.rb:94:in `each'
/var/www/miq/vmdb/app/presenters/tree_builder_vms_and_templates.rb:94:in `sort_tree'
/var/www/miq/vmdb/app/presenters/tree_builder_vms_and_templates.rb:95:in `block in sort_tree'
/var/www/miq/vmdb/app/presenters/tree_builder_vms_and_templates.rb:94:in `each'
/var/www/miq/vmdb/app/presenters/tree_builder_vms_and_templates.rb:94:in `sort_tree'
/var/www/miq/vmdb/app/presenters/tree_builder_vms_and_templates.rb:23:in `relationship_tree'
/var/www/miq/vmdb/app/presenters/full_tree_builder.rb:20:in `tree'
/var/www/miq/vmdb/app/presenters/tree_builder_vandt.rb:12:in `block in x_get_tree_roots'
/var/www/miq/vmdb/app/presenters/tree_builder_vandt.rb:12:in `collect!'
/var/www/miq/vmdb/app/presenters/tree_builder_vandt.rb:12:in `x_get_tree_roots'
/var/www/miq/vmdb/app/presenters/tree_builder.rb:284:in `x_get_tree_objects'
/var/www/miq/vmdb/app/presenters/tree_builder.rb:250:in `x_build_dynatree'
/var/www/miq/vmdb/app/presenters/tree_builder.rb:190:in `build_tree'
/var/www/miq/vmdb/app/presenters/tree_builder.rb:118:in `initialize'
/var/www/miq/vmdb/app/controllers/application_controller/feature.rb:28:in `new'
/var/www/miq/vmdb/app/controllers/application_controller/feature.rb:28:in `build_tree'
/var/www/miq/vmdb/app/controllers/mixins/vm_show_mixin.rb:30:in `block in explorer'
/var/www/miq/vmdb/app/controllers/mixins/vm_show_mixin.rb:30:in `collect'
/var/www/miq/vmdb/app/controllers/mixins/vm_show_mixin.rb:30:in `explorer'
/opt/rh/cfme-gemset/gems/actionpack-4.2.5/lib/action_controller/metal/implicit_render.rb:4:in `send_action'
/opt/rh/cfme-gemset/gems/actionpack-4.2.5/lib/abstract_controller/base.rb:198:in `process_action'
/opt/rh/cfme-gemset/gems/actionpack-4.2.5/lib/action_controller/metal/rendering.rb:10:in `process_action'
/opt/rh/cfme-gemset/gems/actionpack-4.2.5/lib/abstract_controller/callbacks.rb:20:in `block in process_action'
/opt/rh/cfme-gemset/gems/activesupport-4.2.5/lib/active_support/callbacks.rb:117:in `call'
/opt/rh/cfme-gemset/gems/activesupport-4.2.5/lib/active_support/callbacks.rb:117:in `call'
/opt/rh/cfme-gemset/gems/activesupport-4.2.5/lib/active_support/callbacks.rb:555:in `block (2 levels) in compile'
/opt/rh/cfme-gemset/gems/activesupport-4.2.5/lib/active_support/callbacks.rb:505:in `call'
/opt/rh/cfme-gemset/gems/activesupport-4.2.5/lib/active_support/callbacks.rb:505:in `call'
/opt/rh/cfme-gemset/gems/activesupport-4.2.5/lib/active_support/callbacks.rb:92:in `__run_callbacks__'
/opt/rh/cfme-gemset/gems/activesupport-4.2.5/lib/active_support/callbacks.rb:778:in `_run_process_action_callbacks'
/opt/rh/cfme-gemset/gems/activesupport-4.2.5/lib/active_support/callbacks.rb:81:in `run_callbacks'
/opt/rh/cfme-gemset/gems/actionpack-4.2.5/lib/abstract_controller/callbacks.rb:19:in `process_action'
/opt/rh/cfme-gemset/gems/actionpack-4.2.5/lib/action_controller/metal/rescue.rb:29:in `process_action'
/opt/rh/cfme-gemset/gems/actionpack-4.2.5/lib/action_controller/metal/instrumentation.rb:32:in `block in process_action'
/opt/rh/cfme-gemset/gems/activesupport-4.2.5/lib/active_support/notifications.rb:164:in `block in instrument'
/opt/rh/cfme-gemset/gems/activesupport-4.2.5/lib/active_support/notifications/instrumenter.rb:20:in `instrument'
/opt/rh/cfme-gemset/gems/activesupport-4.2.5/lib/active_support/notifications.rb:164:in `instrument'
/opt/rh/cfme-gemset/gems/actionpack-4.2.5/lib/action_controller/metal/instrumentation.rb:30:in `process_action'
/opt/rh/cfme-gemset/gems/actionpack-4.2.5/lib/action_controller/metal/params_wrapper.rb:250:in `process_action'
/opt/rh/cfme-gemset/gems/activerecord-4.2.5/lib/active_record/railties/controller_runtime.rb:18:in `process_action'
/opt/rh/cfme-gemset/gems/actionpack-4.2.5/lib/abstract_controller/base.rb:137:in `process'
/opt/rh/cfme-gemset/gems/actionview-4.2.5/lib/action_view/rendering.rb:30:in `process'
/opt/rh/cfme-gemset/gems/actionpack-4.2.5/lib/action_controller/metal.rb:196:in `dispatch'
/opt/rh/cfme-gemset/gems/actionpack-4.2.5/lib/action_controller/metal/rack_delegation.rb:13:in `dispatch'
/opt/rh/cfme-gemset/gems/actionpack-4.2.5/lib/action_controller/metal.rb:237:in `block in action'
/opt/rh/cfme-gemset/gems/actionpack-4.2.5/lib/action_dispatch/routing/route_set.rb:76:in `call'
/opt/rh/cfme-gemset/gems/actionpack-4.2.5/lib/action_dispatch/routing/route_set.rb:76:in `dispatch'
/opt/rh/cfme-gemset/gems/actionpack-4.2.5/lib/action_dispatch/routing/route_set.rb:45:in `serve'
/opt/rh/cfme-gemset/gems/actionpack-4.2.5/lib/action_dispatch/journey/router.rb:43:in `block in serve'
/opt/rh/cfme-gemset/gems/actionpack-4.2.5/lib/action_dispatch/journey/router.rb:30:in `each'
/opt/rh/cfme-gemset/gems/actionpack-4.2.5/lib/action_dispatch/journey/router.rb:30:in `serve'
/opt/rh/cfme-gemset/gems/actionpack-4.2.5/lib/action_dispatch/routing/route_set.rb:817:in `call'
/opt/rh/cfme-gemset/gems/rack-1.6.4/lib/rack/etag.rb:24:in `call'
/opt/rh/cfme-gemset/gems/rack-1.6.4/lib/rack/conditionalget.rb:25:in `call'
/opt/rh/cfme-gemset/gems/rack-1.6.4/lib/rack/head.rb:13:in `call'
/opt/rh/cfme-gemset/gems/actionpack-4.2.5/lib/action_dispatch/middleware/params_parser.rb:27:in `call'
/opt/rh/cfme-gemset/gems/actionpack-4.2.5/lib/action_dispatch/middleware/flash.rb:260:in `call'
/opt/rh/cfme-gemset/gems/rack-1.6.4/lib/rack/session/abstract/id.rb:225:in `context'
/opt/rh/cfme-gemset/gems/rack-1.6.4/lib/rack/session/abstract/id.rb:220:in `call'
/opt/rh/cfme-gemset/gems/actionpack-4.2.5/lib/action_dispatch/middleware/cookies.rb:560:in `call'
/opt/rh/cfme-gemset/gems/activerecord-4.2.5/lib/active_record/query_cache.rb:36:in `call'
/opt/rh/cfme-gemset/gems/activerecord-4.2.5/lib/active_record/connection_adapters/abstract/connection_pool.rb:653:in `call'
/opt/rh/cfme-gemset/gems/actionpack-4.2.5/lib/action_dispatch/middleware/callbacks.rb:29:in `block in call'
/opt/rh/cfme-gemset/gems/activesupport-4.2.5/lib/active_support/callbacks.rb:88:in `__run_callbacks__'
/opt/rh/cfme-gemset/gems/activesupport-4.2.5/lib/active_support/callbacks.rb:778:in `_run_call_callbacks'
/opt/rh/cfme-gemset/gems/activesupport-4.2.5/lib/active_support/callbacks.rb:81:in `run_callbacks'
/opt/rh/cfme-gemset/gems/actionpack-4.2.5/lib/action_dispatch/middleware/callbacks.rb:27:in `call'
/opt/rh/cfme-gemset/gems/actionpack-4.2.5/lib/action_dispatch/middleware/remote_ip.rb:78:in `call'
/opt/rh/cfme-gemset/gems/actionpack-4.2.5/lib/action_dispatch/middleware/debug_exceptions.rb:17:in `call'
/opt/rh/cfme-gemset/gems/actionpack-4.2.5/lib/action_dispatch/middleware/show_exceptions.rb:30:in `call'
/opt/rh/cfme-gemset/gems/railties-4.2.5/lib/rails/rack/logger.rb:38:in `call_app'
/opt/rh/cfme-gemset/gems/railties-4.2.5/lib/rails/rack/logger.rb:22:in `call'
/opt/rh/cfme-gemset/gems/actionpack-4.2.5/lib/action_dispatch/middleware/request_id.rb:21:in `call'
/opt/rh/cfme-gemset/gems/rack-1.6.4/lib/rack/methodoverride.rb:22:in `call'
/opt/rh/cfme-gemset/gems/rack-1.6.4/lib/rack/runtime.rb:18:in `call'
/opt/rh/cfme-gemset/gems/activesupport-4.2.5/lib/active_support/cache/strategy/local_cache_middleware.rb:28:in `call'
/opt/rh/cfme-gemset/gems/rack-1.6.4/lib/rack/lock.rb:17:in `call'
/opt/rh/cfme-gemset/gems/actionpack-4.2.5/lib/action_dispatch/middleware/static.rb:116:in `call'
/opt/rh/cfme-gemset/gems/actionpack-4.2.5/lib/action_dispatch/middleware/static.rb:116:in `call'
/opt/rh/cfme-gemset/gems/rack-1.6.4/lib/rack/sendfile.rb:113:in `call'
/opt/rh/cfme-gemset/gems/railties-4.2.5/lib/rails/engine.rb:518:in `call'
/opt/rh/cfme-gemset/gems/railties-4.2.5/lib/rails/application.rb:165:in `call'
/opt/rh/cfme-gemset/gems/rack-1.6.4/lib/rack/content_length.rb:15:in `call'
/opt/rh/rh-ruby22/root/usr/share/gems/gems/thin-1.6.3/lib/thin/connection.rb:86:in `block in pre_process'
/opt/rh/rh-ruby22/root/usr/share/gems/gems/thin-1.6.3/lib/thin/connection.rb:84:in `catch'
/opt/rh/rh-ruby22/root/usr/share/gems/gems/thin-1.6.3/lib/thin/connection.rb:84:in `pre_process'
/opt/rh/rh-ruby22/root/usr/share/gems/gems/thin-1.6.3/lib/thin/connection.rb:53:in `process'
/opt/rh/rh-ruby22/root/usr/share/gems/gems/thin-1.6.3/lib/thin/connection.rb:39:in `receive_data'
/opt/rh/rh-ruby22/root/usr/share/gems/gems/eventmachine-1.0.7/lib/eventmachine.rb:187:in `run_machine'
/opt/rh/rh-ruby22/root/usr/share/gems/gems/eventmachine-1.0.7/lib/eventmachine.rb:187:in `run'
/opt/rh/rh-ruby22/root/usr/share/gems/gems/thin-1.6.3/lib/thin/backends/base.rb:73:in `start'
/opt/rh/rh-ruby22/root/usr/share/gems/gems/thin-1.6.3/lib/thin/server.rb:162:in `start'
/opt/rh/cfme-gemset/gems/rack-1.6.4/lib/rack/handler/thin.rb:19:in `run'
/opt/rh/cfme-gemset/gems/rack-1.6.4/lib/rack/server.rb:286:in `start'
/opt/rh/cfme-gemset/gems/railties-4.2.5/lib/rails/commands/server.rb:80:in `start'
/opt/rh/cfme-gemset/gems/railties-4.2.5/lib/rails/commands/commands_tasks.rb:80:in `block in server'
/opt/rh/cfme-gemset/gems/railties-4.2.5/lib/rails/commands/commands_tasks.rb:75:in `tap'
/opt/rh/cfme-gemset/gems/railties-4.2.5/lib/rails/commands/commands_tasks.rb:75:in `server'
/opt/rh/cfme-gemset/gems/railties-4.2.5/lib/rails/commands/commands_tasks.rb:39:in `run_command!'
/opt/rh/cfme-gemset/gems/railties-4.2.5/lib/rails/commands.rb:17:in `<top (required)>'
/var/www/miq/vmdb/bin/rails:4:in `require'
/var/www/miq/vmdb/bin/rails:4:in `<main>'
[----] I, [2016-11-07T10:13:31.145399 #44276:124f990]  INFO -- :   Rendered layouts/_exception_contents.html.haml (0.1ms)
[----] I, [2016-11-07T10:13:31.145471 #44276:124f990]  INFO -- :   Rendered layouts/exception.html.haml within layouts/application (0.3ms)


Version-Release number of selected component (if applicable):
5.5.0.13


How reproducible:

See the attached GIF. 

Steps to Reproduce:
1.
2.
3.

Actual results:


Expected results:


Additional info: