NoMethodError: undefined method `categories' for nil:NilClass
@categories = Course.find_by(title: DEFAULT_COURSE).categories.preload(:practices).order(:position)
^^^^^^^^^^^
File "/app/app/controllers/welcome_controller.rb", line 19, in practices
File "/usr/local/bundle/gems/actionpack-6.1.4.7/lib/action_controller/metal/basic_implicit_render.rb", line 6, in send_action
File "/usr/local/bundle/gems/actionpack-6.1.4.7/lib/abstract_controller/base.rb", line 228, in process_action
File "/usr/local/bundle/gems/actionpack-6.1.4.7/lib/action_controller/metal/rendering.rb", line 30, in process_action
File "/usr/local/bundle/gems/actionpack-6.1.4.7/lib/abstract_controller/callbacks.rb", line 42, in block in process_action
File "/usr/local/bundle/gems/activesupport-6.1.4.7/lib/active_support/callbacks.rb", line 117, in block in run_callbacks
File "/usr/local/bundle/gems/react-rails-3.1.1/lib/react/rails/controller_lifecycle.rb", line 33, in use_react_component_helper
File "/usr/local/bundle/gems/activesupport-6.1.4.7/lib/active_support/callbacks.rb", line 126, in block in run_callbacks
File "/usr/local/bundle/gems/active_decorator-1.4.1/lib/active_decorator/view_context.rb", line 37, in block (3 levels) in <module:Filter>
File "/usr/local/bundle/gems/active_decorator-1.4.1/lib/active_decorator/view_context.rb", line 25, in run_with
File "/usr/local/bundle/gems/active_decorator-1.4.1/lib/active_decorator/view_context.rb", line 36, in block (2 levels) in <module:Filter>
File "/usr/local/bundle/gems/activesupport-6.1.4.7/lib/active_support/callbacks.rb", line 126, in instance_exec
File "/usr/local/bundle/gems/activesupport-6.1.4.7/lib/active_support/callbacks.rb", line 126, in block in run_callbacks
File "/usr/local/bundle/gems/actiontext-6.1.4.7/lib/action_text/rendering.rb", line 20, in with_renderer
File "/usr/local/bundle/gems/actiontext-6.1.4.7/lib/action_text/engine.rb", line 59, in block (4 levels) in <class:Engine>
File "/usr/local/bundle/gems/activesupport-6.1.4.7/lib/active_support/callbacks.rb", line 126, in instance_exec
File "/usr/local/bundle/gems/activesupport-6.1.4.7/lib/active_support/callbacks.rb", line 126, in block in run_callbacks
File "/usr/local/bundle/gems/activesupport-6.1.4.7/lib/active_support/callbacks.rb", line 137, in run_callbacks
File "/usr/local/bundle/gems/actionpack-6.1.4.7/lib/abstract_controller/callbacks.rb", line 41, in process_action
File "/usr/local/bundle/gems/actionpack-6.1.4.7/lib/action_controller/metal/rescue.rb", line 22, in process_action
File "/usr/local/bundle/gems/actionpack-6.1.4.7/lib/action_controller/metal/instrumentation.rb", line 34, in block in process_action
File "/usr/local/bundle/gems/activesupport-6.1.4.7/lib/active_support/notifications.rb", line 203, in block in instrument
File "/usr/local/bundle/gems/activesupport-6.1.4.7/lib/active_support/notifications/instrumenter.rb", line 24, in instrument
File "/usr/local/bundle/gems/activesupport-6.1.4.7/lib/active_support/notifications.rb", line 203, in instrument
File "/usr/local/bundle/gems/actionpack-6.1.4.7/lib/action_controller/metal/instrumentation.rb", line 33, in process_action
File "/usr/local/bundle/gems/actionpack-6.1.4.7/lib/action_controller/metal/params_wrapper.rb", line 249, in process_action
File "/usr/local/bundle/gems/activerecord-6.1.4.7/lib/active_record/railties/controller_runtime.rb", line 27, in process_action
File "/usr/local/bundle/gems/actionpack-6.1.4.7/lib/abstract_controller/base.rb", line 165, in process
File "/usr/local/bundle/gems/actionview-6.1.4.7/lib/action_view/rendering.rb", line 39, in process
File "/usr/local/bundle/gems/actionpack-6.1.4.7/lib/action_controller/metal.rb", line 190, in dispatch
File "/usr/local/bundle/gems/actionpack-6.1.4.7/lib/action_controller/metal.rb", line 254, in dispatch
File "/usr/local/bundle/gems/actionpack-6.1.4.7/lib/action_dispatch/routing/route_set.rb", line 50, in dispatch
File "/usr/local/bundle/gems/actionpack-6.1.4.7/lib/action_dispatch/routing/route_set.rb", line 33, in serve
File "/usr/local/bundle/gems/actionpack-6.1.4.7/lib/action_dispatch/journey/router.rb", line 50, in block in serve
File "/usr/local/bundle/gems/actionpack-6.1.4.7/lib/action_dispatch/journey/router.rb", line 32, in each
File "/usr/local/bundle/gems/actionpack-6.1.4.7/lib/action_dispatch/journey/router.rb", line 32, in serve
File "/usr/local/bundle/gems/actionpack-6.1.4.7/lib/action_dispatch/routing/route_set.rb", line 842, in call
File "/usr/local/bundle/gems/omniauth-2.1.1/lib/omniauth/strategy.rb", line 202, in call!
File "/usr/local/bundle/gems/omniauth-2.1.1/lib/omniauth/strategy.rb", line 169, in call
File "/usr/local/bundle/gems/omniauth-2.1.1/lib/omniauth/strategy.rb", line 202, in call!
File "/usr/local/bundle/gems/omniauth-2.1.1/lib/omniauth/strategy.rb", line 169, in call
File "/usr/local/bundle/gems/omniauth-2.1.1/lib/omniauth/builder.rb", line 44, in call
File "/usr/local/bundle/gems/rack-2.2.8.1/lib/rack/tempfile_reaper.rb", line 15, in call
File "/usr/local/bundle/gems/rack-2.2.8.1/lib/rack/etag.rb", line 27, in call
File "/usr/local/bundle/gems/rack-2.2.8.1/lib/rack/conditional_get.rb", line 27, in call
File "/usr/local/bundle/gems/rack-user_agent-0.5.3/lib/rack/user_agent.rb", line 16, in call
File "/usr/local/bundle/gems/rack-2.2.8.1/lib/rack/head.rb", line 12, in call
File "/usr/local/bundle/gems/actionpack-6.1.4.7/lib/action_dispatch/http/permissions_policy.rb", line 22, in call
File "/usr/local/bundle/gems/actionpack-6.1.4.7/lib/action_dispatch/http/content_security_policy.rb", line 18, in call
File "/usr/local/bundle/gems/rack-2.2.8.1/lib/rack/session/abstract/id.rb", line 266, in context
File "/usr/local/bundle/gems/rack-2.2.8.1/lib/rack/session/abstract/id.rb", line 260, in call
File "/usr/local/bundle/gems/actionpack-6.1.4.7/lib/action_dispatch/middleware/cookies.rb", line 689, in call
File "/usr/local/bundle/gems/actionpack-6.1.4.7/lib/action_dispatch/middleware/callbacks.rb", line 27, in block in call
File "/usr/local/bundle/gems/activesupport-6.1.4.7/lib/active_support/callbacks.rb", line 98, in run_callbacks
File "/usr/local/bundle/gems/actionpack-6.1.4.7/lib/action_dispatch/middleware/callbacks.rb", line 26, in call
File "/usr/local/bundle/gems/actionpack-6.1.4.7/lib/action_dispatch/middleware/actionable_exceptions.rb", line 18, in call
File "/usr/local/bundle/gems/rollbar-3.5.2/lib/rollbar/middleware/rails/rollbar.rb", line 25, in block in call
File "/usr/local/bundle/gems/rollbar-3.5.2/lib/rollbar.rb", line 145, in scoped
File "/usr/local/bundle/gems/rollbar-3.5.2/lib/rollbar/middleware/rails/rollbar.rb", line 22, in call
File "/usr/local/bundle/gems/actionpack-6.1.4.7/lib/ac
View details in Rollbar: https://app.rollbar.com/a/komagata/fix/item/Bootcamp/1691