custom button add error

gistfile1.txt

 FATAL -- : Error caught: [NoMethodError] undefined method `[]' for nil:NilClass
/Users/duhlmann/.rvm/gems/ruby-2.5.7/bundler/gems/manageiq-ui-classic-6e87da71221f/app/controllers/application_controller/buttons.rb:478:in `button_create_update'
/Users/duhlmann/.rvm/gems/ruby-2.5.7/bundler/gems/manageiq-ui-classic-6e87da71221f/app/controllers/application_controller/buttons.rb:190:in `button_create'
/Users/duhlmann/.rvm/gems/ruby-2.5.7/gems/actionpack-5.1.7/lib/action_controller/metal/basic_implicit_render.rb:4:in `send_action'
/Users/duhlmann/.rvm/gems/ruby-2.5.7/gems/actionpack-5.1.7/lib/abstract_controller/base.rb:186:in `process_action'
/Users/duhlmann/.rvm/gems/ruby-2.5.7/gems/actionpack-5.1.7/lib/action_controller/metal/rendering.rb:30:in `process_action'
/Users/duhlmann/.rvm/gems/ruby-2.5.7/gems/actionpack-5.1.7/lib/abstract_controller/callbacks.rb:20:in `block in process_action'
/Users/duhlmann/.rvm/gems/ruby-2.5.7/gems/activesupport-5.1.7/lib/active_support/callbacks.rb:131:in `run_callbacks'
/Users/duhlmann/.rvm/gems/ruby-2.5.7/gems/actionpack-5.1.7/lib/abstract_controller/callbacks.rb:19:in `process_action'
/Users/duhlmann/.rvm/gems/ruby-2.5.7/gems/actionpack-5.1.7/lib/action_controller/metal/rescue.rb:20:in `process_action'
/Users/duhlmann/.rvm/gems/ruby-2.5.7/gems/actionpack-5.1.7/lib/action_controller/metal/instrumentation.rb:32:in `block in process_action'
/Users/duhlmann/.rvm/gems/ruby-2.5.7/gems/activesupport-5.1.7/lib/active_support/notifications.rb:166:in `block in instrument'
/Users/duhlmann/.rvm/gems/ruby-2.5.7/gems/activesupport-5.1.7/lib/active_support/notifications/instrumenter.rb:21:in `instrument'
/Users/duhlmann/.rvm/gems/ruby-2.5.7/gems/activesupport-5.1.7/lib/active_support/notifications.rb:166:in `instrument'
/Users/duhlmann/.rvm/gems/ruby-2.5.7/gems/actionpack-5.1.7/lib/action_controller/metal/instrumentation.rb:30:in `process_action'
/Users/duhlmann/.rvm/gems/ruby-2.5.7/gems/actionpack-5.1.7/lib/action_controller/metal/params_wrapper.rb:252:in `process_action'
/Users/duhlmann/.rvm/gems/ruby-2.5.7/gems/activerecord-5.1.7/lib/active_record/railties/controller_runtime.rb:22:in `process_action'
/Users/duhlmann/.rvm/gems/ruby-2.5.7/gems/actionpack-5.1.7/lib/abstract_controller/base.rb:124:in `process'
/Users/duhlmann/.rvm/gems/ruby-2.5.7/gems/actionview-5.1.7/lib/action_view/rendering.rb:30:in `process'
/Users/duhlmann/.rvm/gems/ruby-2.5.7/gems/actionpack-5.1.7/lib/action_controller/metal.rb:189:in `dispatch'
/Users/duhlmann/.rvm/gems/ruby-2.5.7/gems/actionpack-5.1.7/lib/action_controller/metal.rb:253:in `dispatch'
/Users/duhlmann/.rvm/gems/ruby-2.5.7/gems/actionpack-5.1.7/lib/action_dispatch/routing/route_set.rb:49:in `dispatch'
/Users/duhlmann/.rvm/gems/ruby-2.5.7/gems/actionpack-5.1.7/lib/action_dispatch/routing/route_set.rb:31:in `serve'
/Users/duhlmann/.rvm/gems/ruby-2.5.7/gems/actionpack-5.1.7/lib/action_dispatch/journey/router.rb:50:in `block in serve'
/Users/duhlmann/.rvm/gems/ruby-2.5.7/gems/actionpack-5.1.7/lib/action_dispatch/journey/router.rb:33:in `each'
/Users/duhlmann/.rvm/gems/ruby-2.5.7/gems/actionpack-5.1.7/lib/action_dispatch/journey/router.rb:33:in `serve'
/Users/duhlmann/.rvm/gems/ruby-2.5.7/gems/actionpack-5.1.7/lib/action_dispatch/routing/route_set.rb:844:in `call'
/Users/duhlmann/.rvm/gems/ruby-2.5.7/gems/secure_headers-3.0.3/lib/secure_headers/middleware.rb:10:in `call'
/Users/duhlmann/manageiq/lib/request_started_on_middleware.rb:12:in `call'
/Users/duhlmann/.rvm/gems/ruby-2.5.7/gems/rack-2.0.7/lib/rack/etag.rb:25:in `call'
/Users/duhlmann/.rvm/gems/ruby-2.5.7/gems/rack-2.0.7/lib/rack/conditional_get.rb:38:in `call'
/Users/duhlmann/.rvm/gems/ruby-2.5.7/gems/rack-2.0.7/lib/rack/head.rb:12:in `call'
/Users/duhlmann/.rvm/gems/ruby-2.5.7/gems/rack-2.0.7/lib/rack/session/abstract/id.rb:232:in `context'
/Users/duhlmann/.rvm/gems/ruby-2.5.7/gems/rack-2.0.7/lib/rack/session/abstract/id.rb:226:in `call'
/Users/duhlmann/.rvm/gems/ruby-2.5.7/gems/actionpack-5.1.7/lib/action_dispatch/middleware/cookies.rb:613:in `call'
/Users/duhlmann/.rvm/gems/ruby-2.5.7/gems/actionpack-5.1.7/lib/action_dispatch/middleware/callbacks.rb:26:in `block in call'
/Users/duhlmann/.rvm/gems/ruby-2.5.7/gems/activesupport-5.1.7/lib/active_support/callbacks.rb:97:in `run_callbacks'
/Users/duhlmann/.rvm/gems/ruby-2.5.7/gems/actionpack-5.1.7/lib/action_dispatch/middleware/callbacks.rb:24:in `call'
/Users/duhlmann/.rvm/gems/ruby-2.5.7/gems/actionpack-5.1.7/lib/action_dispatch/middleware/executor.rb:12:in `call'
/Users/duhlmann/.rvm/gems/ruby-2.5.7/gems/actionpack-5.1.7/lib/action_dispatch/middleware/debug_exceptions.rb:59:in `call'
/Users/duhlmann/.rvm/gems/ruby-2.5.7/gems/actionpack-5.1.7/lib/action_dispatch/middleware/show_exceptions.rb:31:in `call'
/Users/duhlmann/.rvm/gems/ruby-2.5.7/gems/railties-5.1.7/lib/rails/rack/logger.rb:36:in `call_app'
/Users/duhlmann/.rvm/gems/ruby-2.5.7/gems/railties-5.1.7/lib/rails/rack/logger.rb:26:in `call'
/Users/duhlmann/.rvm/gems/ruby-2.5.7/gems/sprockets-rails-3.2.1/lib/sprockets/rails/quiet_assets.rb:13:in `call'
/Users/duhlmann/.rvm/gems/ruby-2.5.7/gems/actionpack-5.1.7/lib/action_dispatch/middleware/remote_ip.rb:79:in `call'
/Users/duhlmann/.rvm/gems/ruby-2.5.7/gems/actionpack-5.1.7/lib/action_dispatch/middleware/request_id.rb:25:in `call'
/Users/duhlmann/.rvm/gems/ruby-2.5.7/gems/rack-2.0.7/lib/rack/method_override.rb:22:in `call'
/Users/duhlmann/.rvm/gems/ruby-2.5.7/gems/rack-2.0.7/lib/rack/runtime.rb:22:in `call'
/Users/duhlmann/.rvm/gems/ruby-2.5.7/gems/activesupport-5.1.7/lib/active_support/cache/strategy/local_cache_middleware.rb:27:in `call'
/Users/duhlmann/.rvm/gems/ruby-2.5.7/gems/actionpack-5.1.7/lib/action_dispatch/middleware/executor.rb:12:in `call'
/Users/duhlmann/.rvm/gems/ruby-2.5.7/gems/actionpack-5.1.7/lib/action_dispatch/middleware/static.rb:125:in `call'
/Users/duhlmann/.rvm/gems/ruby-2.5.7/gems/rack-2.0.7/lib/rack/sendfile.rb:111:in `call'
/Users/duhlmann/.rvm/gems/ruby-2.5.7/gems/railties-5.1.7/lib/rails/engine.rb:522:in `call'
/Users/duhlmann/.rvm/gems/ruby-2.5.7/gems/puma-4.3.0/lib/puma/configuration.rb:228:in `call'
/Users/duhlmann/.rvm/gems/ruby-2.5.7/gems/puma-4.3.0/lib/puma/server.rb:667:in `handle_request'
/Users/duhlmann/.rvm/gems/ruby-2.5.7/gems/puma-4.3.0/lib/puma/server.rb:470:in `process_client'
/Users/duhlmann/.rvm/gems/ruby-2.5.7/gems/puma-4.3.0/lib/puma/server.rb:328:in `block in run'
/Users/duhlmann/.rvm/gems/ruby-2.5.7/gems/puma-4.3.0/lib/puma/thread_pool.rb:134:in `block in spawn_thread'
[----] I, [2019-11-19T14:32:38.734321 #65213:3ffc2c3bf4a8]  INFO -- :   Rendered /Users/duhlmann/.rvm/gems/ruby-2.5.7/bundler/gems/manageiq-ui-classic-6e87da71221f/app/views/layouts/_exception_contents.html.haml (6.1ms)
[----] I, [2019-11-19T14:32:38.734782 #65213:3ffc2c3bf4a8]  INFO -- : Completed 200 OK in 22ms (Views: 9.8ms | ActiveRecord: 1.7ms)