Describe the bug
Trying to comment an initiative causes a server error (500).

To Reproduce
Steps to reproduce the behavior:

1. Go to an initiative
2. Scroll down to 'Add your comment' and try to send
3. Nothing happens

Stacktrace

INFO -- : Completed 500 Internal Server Error in 43ms (ActiveRecord: 2.6ms)
FATAL -- :
FATAL -- : NoMethodError (undefined method component' for #<Decidim::Initiative:0x00005601bb0f5268> Did you mean? components components=): FATAL -- : FATAL -- : activemodel (5.2.6) lib/active_model/attribute_methods.rb:430:in method_missing'
decidim-comments (0.24.2) app/controllers/decidim/comments/comments_controller.rb:47:in create' actionpack (5.2.6) lib/action_controller/metal/basic_implicit_render.rb:6:in send_action'
actionpack (5.2.6) lib/abstract_controller/base.rb:194:in process_action' actionpack (5.2.6) lib/action_controller/metal/rendering.rb:30:in process_action'
actionpack (5.2.6) lib/abstract_controller/callbacks.rb:42:in block in process_action' activesupport (5.2.6) lib/active_support/callbacks.rb:109:in block in run_callbacks'
activesupport (5.2.6) lib/active_support/core_ext/time/zones.rb:66:in use_zone' decidim-core (0.24.2) app/controllers/concerns/decidim/use_organization_time_zone.rb:21:in use_organization_time_zone'
activesupport (5.2.6) lib/active_support/callbacks.rb:118:in block in run_callbacks' i18n (1.8.10) lib/i18n.rb:314:in with_locale'
decidim-core (0.24.2) app/controllers/concerns/decidim/locale_switcher.rb:24:in switch_locale' activesupport (5.2.6) lib/active_support/callbacks.rb:118:in block in run_callbacks'
activesupport (5.2.6) lib/active_support/callbacks.rb:136:in run_callbacks' actionpack (5.2.6) lib/abstract_controller/callbacks.rb:41:in process_action'
actionpack (5.2.6) lib/action_controller/metal/rescue.rb:22:in process_action' actionpack (5.2.6) lib/action_controller/metal/instrumentation.rb:34:in block in process_action'
activesupport (5.2.6) lib/active_support/notifications.rb:168:in block in instrument' activesupport (5.2.6) lib/active_support/notifications/instrumenter.rb:23:in instrument'
activesupport (5.2.6) lib/active_support/notifications.rb:168:in instrument' actionpack (5.2.6) lib/action_controller/metal/instrumentation.rb:32:in process_action'
actionpack (5.2.6) lib/action_controller/metal/params_wrapper.rb:256:in process_action' activerecord (5.2.6) lib/active_record/railties/controller_runtime.rb:24:in process_action'
actionpack (5.2.6) lib/abstract_controller/base.rb:134:in process' actionview (5.2.6) lib/action_view/rendering.rb:32:in process'
actionpack (5.2.6) lib/action_controller/metal.rb:191:in dispatch' actionpack (5.2.6) lib/action_controller/metal.rb:252:in dispatch'
actionpack (5.2.6) lib/action_dispatch/routing/route_set.rb:52:in dispatch' actionpack (5.2.6) lib/action_dispatch/routing/route_set.rb:34:in serve'
actionpack (5.2.6) lib/action_dispatch/journey/router.rb:52:in block in serve' actionpack (5.2.6) lib/action_dispatch/journey/router.rb:35:in each'
actionpack (5.2.6) lib/action_dispatch/journey/router.rb:35:in serve' actionpack (5.2.6) lib/action_dispatch/routing/route_set.rb:840:in call'
railties (5.2.6) lib/rails/engine.rb:524:in call' railties (5.2.6) lib/rails/railtie.rb:190:in public_send'
railties (5.2.6) lib/rails/railtie.rb:190:in method_missing' actionpack (5.2.6) lib/action_dispatch/routing/mapper.rb:19:in block in class:Constraints'
actionpack (5.2.6) lib/action_dispatch/routing/mapper.rb:48:in serve' actionpack (5.2.6) lib/action_dispatch/journey/router.rb:52:in block in serve'
actionpack (5.2.6) lib/action_dispatch/journey/router.rb:35:in each' actionpack (5.2.6) lib/action_dispatch/journey/router.rb:35:in serve'
actionpack (5.2.6) lib/action_dispatch/routing/route_set.rb:840:in call' railties (5.2.6) lib/rails/engine.rb:524:in call'
railties (5.2.6) lib/rails/railtie.rb:190:in public_send' railties (5.2.6) lib/rails/railtie.rb:190:in method_missing'
actionpack (5.2.6) lib/action_dispatch/routing/mapper.rb:19:in block in <class:Constraints>' actionpack (5.2.6) lib/action_dispatch/routing/mapper.rb:48:in serve'
actionpack (5.2.6) lib/action_dispatch/journey/router.rb:52:in block in serve' actionpack (5.2.6) lib/action_dispatch/journey/router.rb:35:in each'
actionpack (5.2.6) lib/action_dispatch/journey/router.rb:35:in serve' actionpack (5.2.6) lib/action_dispatch/routing/route_set.rb:840:in call'
batch-loader (1.5.0) lib/batch_loader/middleware.rb:11:in call' rack-attack (6.5.0) lib/rack/attack.rb:113:in call'
omniauth (1.9.1) lib/omniauth/strategy.rb:192:in call!' omniauth (1.9.1) lib/omniauth/strategy.rb:169:in call'
omniauth (1.9.1) lib/omniauth/strategy.rb:192:in call!' omniauth (1.9.1) lib/omniauth/strategy.rb:169:in call'
omniauth (1.9.1) lib/omniauth/strategy.rb:192:in call!' omniauth (1.9.1) lib/omniauth/strategy.rb:169:in call'
omniauth (1.9.1) lib/omniauth/builder.rb:45:in call' warden (1.2.9) lib/warden/manager.rb:36:in block in call'
warden (1.2.9) lib/warden/manager.rb:34:in catch' warden (1.2.9) lib/warden/manager.rb:34:in call'
decidim-core (0.24.2) app/middleware/decidim/strip_x_forwarded_host.rb:11:in call' decidim-core (0.24.2) app/middleware/decidim/current_organization.rb:21:in call'
rack (2.2.3) lib/rack/tempfile_reaper.rb:15:in call' rack (2.2.3) lib/rack/etag.rb:27:in call'
rack (2.2.3) lib/rack/conditional_get.rb:40:in call' rack (2.2.3) lib/rack/head.rb:12:in call'
actionpack (5.2.6) lib/action_dispatch/http/content_security_policy.rb:18:in call' rack (2.2.3) lib/rack/session/abstract/id.rb:266:in context'
rack (2.2.3) lib/rack/session/abstract/id.rb:260:in call' actionpack (5.2.6) lib/action_dispatch/middleware/cookies.rb:670:in call'
actionpack (5.2.6) lib/action_dispatch/middleware/callbacks.rb:28:in block in call' activesupport (5.2.6) lib/active_support/callbacks.rb:98:in run_callbacks'
actionpack (5.2.6) lib/action_dispatch/middleware/callbacks.rb:26:in call' actionpack (5.2.6) lib/action_dispatch/middleware/debug_exceptions.rb:61:in call'
actionpack (5.2.6) lib/action_dispatch/middleware/show_exceptions.rb:33:in call' railties (5.2.6) lib/rails/rack/logger.rb:38:in call_app'
railties (5.2.6) lib/rails/rack/logger.rb:26:in block in call' activesupport (5.2.6) lib/active_support/tagged_logging.rb:71:in block in tagged'
activesupport (5.2.6) lib/active_support/tagged_logging.rb:28:in tagged' activesupport (5.2.6) lib/active_support/tagged_logging.rb:71:in tagged'
railties (5.2.6) lib/rails/rack/logger.rb:26:in call' actionpack (5.2.6) lib/action_dispatch/middleware/remote_ip.rb:81:in call'
request_store (1.5.0) lib/request_store/middleware.rb:19:in call' actionpack (5.2.6) lib/action_dispatch/middleware/request_id.rb:27:in call'
rack (2.2.3) lib/rack/method_override.rb:24:in call' activesupport (5.2.6) lib/active_support/cache/strategy/local_cache_middleware.rb:29:in call'
actionpack (5.2.6) lib/action_dispatch/middleware/executor.rb:14:in call' rack (2.2.3) lib/rack/sendfile.rb:110:in call'
rack-cors (1.1.1) lib/rack/cors.rb:100:in call' railties (5.2.6) lib/rails/engine.rb:524:in call'
/usr/lib/ruby/vendor_ruby/phusion_passenger/rack/thread_handler_extension.rb:107:in process_request' /usr/lib/ruby/vendor_ruby/phusion_passenger/request_handler/thread_handler.rb:157:in accept_and_process_next_request'
/usr/lib/ruby/vendor_ruby/phusion_passenger/request_handler/thread_handler.rb:110:in main_loop' /usr/lib/ruby/vendor_ruby/phusion_passenger/request_handler.rb:416:in block (3 levels) in start_threads'
/usr/lib/ruby/vendor_ruby/phusion_passenger/utils.rb:113:in `block in create_thread_and_abort_on_exception'

Extra data (please complete the following information):

• Device: any
• Device OS: any
• Browser: any
• Decidim Version: 0.24.2