NoMethodError: undefined method `round' for nil:NilClass

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View details in Rollbar: https://rollbar.com/seinsight-ac/sein/items/48/

NoMethodError: undefined method `round' for nil:NilClass
  File "/home/deploy/sein-dashboard/releases/20181001060158/app/controllers/dashboards_controller.rb", line 532, in ga_preprocess
  File "/home/deploy/sein-dashboard/releases/20181001060158/app/controllers/dashboards_controller.rb", line 39, in create
  File "/home/deploy/sein-dashboard/shared/bundle/ruby/2.4.0/gems/actionpack-5.1.6/lib/action_controller/metal/basic_implicit_render.rb", line 4, in send_action
  File "/home/deploy/sein-dashboard/shared/bundle/ruby/2.4.0/gems/actionpack-5.1.6/lib/abstract_controller/base.rb", line 186, in process_action
  File "/home/deploy/sein-dashboard/shared/bundle/ruby/2.4.0/gems/actionpack-5.1.6/lib/action_controller/metal/rendering.rb", line 30, in process_action
  File "/home/deploy/sein-dashboard/shared/bundle/ruby/2.4.0/gems/actionpack-5.1.6/lib/abstract_controller/callbacks.rb", line 20, in block in process_action
  File "/home/deploy/sein-dashboard/shared/bundle/ruby/2.4.0/gems/activesupport-5.1.6/lib/active_support/callbacks.rb", line 131, in run_callbacks
  File "/home/deploy/sein-dashboard/shared/bundle/ruby/2.4.0/gems/actionpack-5.1.6/lib/abstract_controller/callbacks.rb", line 19, in process_action
  File "/home/deploy/sein-dashboard/shared/bundle/ruby/2.4.0/gems/actionpack-5.1.6/lib/action_controller/metal/rescue.rb", line 20, in process_action
  File "/home/deploy/sein-dashboard/shared/bundle/ruby/2.4.0/gems/actionpack-5.1.6/lib/action_controller/metal/instrumentation.rb", line 32, in block in process_action
  File "/home/deploy/sein-dashboard/shared/bundle/ruby/2.4.0/gems/activesupport-5.1.6/lib/active_support/notifications.rb", line 166, in block in instrument
  File "/home/deploy/sein-dashboard/shared/bundle/ruby/2.4.0/gems/activesupport-5.1.6/lib/active_support/notifications/instrumenter.rb", line 21, in instrument
  File "/home/deploy/sein-dashboard/shared/bundle/ruby/2.4.0/gems/activesupport-5.1.6/lib/active_support/notifications.rb", line 166, in instrument
  File "/home/deploy/sein-dashboard/shared/bundle/ruby/2.4.0/gems/actionpack-5.1.6/lib/action_controller/metal/instrumentation.rb", line 30, in process_action
  File "/home/deploy/sein-dashboard/shared/bundle/ruby/2.4.0/gems/actionpack-5.1.6/lib/action_controller/metal/params_wrapper.rb", line 252, in process_action
  File "/home/deploy/sein-dashboard/shared/bundle/ruby/2.4.0/gems/activerecord-5.1.6/lib/active_record/railties/controller_runtime.rb", line 22, in process_action
  File "/home/deploy/sein-dashboard/shared/bundle/ruby/2.4.0/gems/actionpack-5.1.6/lib/abstract_controller/base.rb", line 124, in process
  File "/home/deploy/sein-dashboard/shared/bundle/ruby/2.4.0/gems/actionview-5.1.6/lib/action_view/rendering.rb", line 30, in process
  File "/home/deploy/sein-dashboard/shared/bundle/ruby/2.4.0/gems/actionpack-5.1.6/lib/action_controller/metal.rb", line 189, in dispatch
  File "/home/deploy/sein-dashboard/shared/bundle/ruby/2.4.0/gems/actionpack-5.1.6/lib/action_controller/metal.rb", line 253, in dispatch
  File "/home/deploy/sein-dashboard/shared/bundle/ruby/2.4.0/gems/actionpack-5.1.6/lib/action_dispatch/routing/route_set.rb", line 49, in dispatch
  File "/home/deploy/sein-dashboard/shared/bundle/ruby/2.4.0/gems/actionpack-5.1.6/lib/action_dispatch/routing/route_set.rb", line 31, in serve
  File "/home/deploy/sein-dashboard/shared/bundle/ruby/2.4.0/gems/actionpack-5.1.6/lib/action_dispatch/journey/router.rb", line 50, in block in serve
  File "/home/deploy/sein-dashboard/shared/bundle/ruby/2.4.0/gems/actionpack-5.1.6/lib/action_dispatch/journey/router.rb", line 33, in each
  File "/home/deploy/sein-dashboard/shared/bundle/ruby/2.4.0/gems/actionpack-5.1.6/lib/action_dispatch/journey/router.rb", line 33, in serve
  File "/home/deploy/sein-dashboard/shared/bundle/ruby/2.4.0/gems/actionpack-5.1.6/lib/action_dispatch/routing/route_set.rb", line 844, in call
  File "/home/deploy/sein-dashboard/shared/bundle/ruby/2.4.0/gems/warden-1.2.7/lib/warden/manager.rb", line 36, in block in call
  File "/home/deploy/sein-dashboard/shared/bundle/ruby/2.4.0/gems/warden-1.2.7/lib/warden/manager.rb", line 35, in catch
  File "/home/deploy/sein-dashboard/shared/bundle/ruby/2.4.0/gems/warden-1.2.7/lib/warden/manager.rb", line 35, in call
  File "/home/deploy/sein-dashboard/shared/bundle/ruby/2.4.0/gems/rack-2.0.5/lib/rack/etag.rb", line 25, in call
  File "/home/deploy/sein-dashboard/shared/bundle/ruby/2.4.0/gems/rack-2.0.5/lib/rack/conditional_get.rb", line 38, in call
  File "/home/deploy/sein-dashboard/shared/bundle/ruby/2.4.0/gems/rack-2.0.5/lib/rack/head.rb", line 12, in call
  File "/home/deploy/sein-dashboard/shared/bundle/ruby/2.4.0/gems/rack-2.0.5/lib/rack/session/abstract/id.rb", line 232, in context
  File "/home/deploy/sein-dashboard/shared/bundle/ruby/2.4.0/gems/rack-2.0.5/lib/rack/session/abstract/id.rb", line 226, in call
  File "/home/deploy/sein-dashboard/shared/bundle/ruby/2.4.0/gems/actionpack-5.1.6/lib/action_dispatch/middleware/cookies.rb", line 613, in call
  File "/home/deploy/sein-dashboard/shared/bundle/ruby/2.4.0/gems/actionpack-5.1.6/lib/action_dispatch/middleware/callbacks.rb", line 26, in block in call
  File "/home/deploy/sein-dashboard/shared/bundle/ruby/2.4.0/gems/activesupport-5.1.6/lib/active_support/callbacks.rb", line 97, in run_callbacks
  File "/home/deploy/sein-dashboard/shared/bundle/ruby/2.4.0/gems/actionpack-5.1.6/lib/action_dispatch/middleware/callbacks.rb", line 24, in call
  File "/home/deploy/sein-dashboard/shared/bundle/ruby/2.4.0/gems/rollbar-2.18.0/lib/rollbar/middleware/rails/rollbar.rb", line 24, in block in call
  File "/home/deploy/sein-dashboard/shared/bundle/ruby/2.4.0/gems/rollbar-2.18.0/lib/rollbar.rb", line 146, in scoped
  File "/home/deploy/sein-dashboard/shared/bundle/ruby/2.4.0/gems/rollbar-2.18.0/lib/rollbar/middleware/rails/rollbar.rb", line 22, in call
  File "/home/deploy/sein-dashboard/shared/bundle/ruby/2.4.0/gems/actionpack-5.1.6/lib/action_dispatch/middleware/debug_exceptions.rb", line 59, in call
  File "/home/deploy/sein-dashboard/shared/bundle/ruby/2.4.0/gems/rollbar-2.18.0/lib/rollbar/middleware/rails/show_exceptions.rb", line 22, in call_with_rollbar
  File "/home/deploy/sein-dashboard/shared/bundle/ruby/2.4.0/gems/actionpack-5.1.6/lib/action_dispatch/middleware/show_exceptions.rb", line 31, in call
  File "/home/deploy/sein-dashboard/shared/bundle/ruby/2.4.0/gems/railties-5.1.6/lib/rails/rack/logger.rb", line 36, in call_app
  File "/home/deploy/sein-dashboard/shared/bundle/ruby/2.4.0/gems/railties-5.1.6/lib/rails/rack/logger.rb", line 24, in block in call
  File "/home/deploy/sein-dashboard/shared/bundle/ruby/2.4.0/gems/activesupport-5.1.6/lib/active_support/tagged_logging.rb", line 69, in block in tagged
  File "/home/deploy/sein-dashboard/shared/bundle/ruby/2.4.0/gems/activesupport-5.1.6/lib/active_support/tag