NoMethodError - undefined method `delay' for #<Devise::Models::Campaignable::Adapters::Mailchimp:0x007fcfebf04958>:
devise_campaignable (0.0.3) lib/devise_campaignable/model.rb:63:in `list_manager'
devise_campaignable (0.0.3) lib/devise_campaignable/model.rb:33:in `subscribe'
activesupport (4.1.12) lib/active_support/callbacks.rb:429:in `block in make_lambda'
activesupport (4.1.12) lib/active_support/callbacks.rb:224:in `block in halting_and_conditional'
activesupport (4.1.12) lib/active_support/callbacks.rb:503:in `block in call'
activesupport (4.1.12) lib/active_support/callbacks.rb:503:in `call'
activesupport (4.1.12) lib/active_support/callbacks.rb:86:in `run_callbacks'
activerecord (4.1.12) lib/active_record/callbacks.rb:306:in `_create_record'
activerecord (4.1.12) lib/active_record/timestamp.rb:57:in `_create_record'
activerecord (4.1.12) lib/active_record/persistence.rb:484:in `create_or_update'
activerecord (4.1.12) lib/active_record/callbacks.rb:302:in `block in create_or_update'
activesupport (4.1.12) lib/active_support/callbacks.rb:113:in `call'
activesupport (4.1.12) lib/active_support/callbacks.rb:552:in `block (2 levels) in compile'
activesupport (4.1.12) lib/active_support/callbacks.rb:502:in `call'
activesupport (4.1.12) lib/active_support/callbacks.rb:86:in `run_callbacks'
activerecord (4.1.12) lib/active_record/callbacks.rb:302:in `create_or_update'
activerecord (4.1.12) lib/active_record/persistence.rb:103:in `save'
activerecord (4.1.12) lib/active_record/validations.rb:51:in `save'
activerecord (4.1.12) lib/active_record/attribute_methods/dirty.rb:21:in `save'
activerecord (4.1.12) lib/active_record/transactions.rb:268:in `block (2 levels) in save'
activerecord (4.1.12) lib/active_record/transactions.rb:329:in `block in with_transaction_returning_status'
activerecord (4.1.12) lib/active_record/connection_adapters/abstract/database_statements.rb:201:in `block in transaction'
activerecord (4.1.12) lib/active_record/connection_adapters/abstract/database_statements.rb:209:in `within_new_transaction'
activerecord (4.1.12) lib/active_record/connection_adapters/abstract/database_statements.rb:201:in `transaction'
activerecord (4.1.12) lib/active_record/transactions.rb:208:in `transaction'
activerecord (4.1.12) lib/active_record/transactions.rb:326:in `with_transaction_returning_status'
activerecord (4.1.12) lib/active_record/transactions.rb:268:in `block in save'
activerecord (4.1.12) lib/active_record/transactions.rb:283:in `rollback_active_record_state!'
activerecord (4.1.12) lib/active_record/transactions.rb:267:in `save'
devise (3.4.1) app/controllers/devise/registrations_controller.rb:19:in `create'
actionpack (4.1.12) lib/action_controller/metal/implicit_render.rb:4:in `send_action'
actionpack (4.1.12) lib/abstract_controller/base.rb:189:in `process_action'
actionpack (4.1.12) lib/action_controller/metal/rendering.rb:10:in `process_action'
actionpack (4.1.12) lib/abstract_controller/callbacks.rb:20:in `block in process_action'
activesupport (4.1.12) lib/active_support/callbacks.rb:113:in `call'
activesupport (4.1.12) lib/active_support/callbacks.rb:552:in `block (2 levels) in compile'
activesupport (4.1.12) lib/active_support/callbacks.rb:502:in `call'
activesupport (4.1.12) lib/active_support/callbacks.rb:86:in `run_callbacks'
actionpack (4.1.12) lib/abstract_controller/callbacks.rb:19:in `process_action'
actionpack (4.1.12) lib/action_controller/metal/rescue.rb:29:in `process_action'
actionpack (4.1.12) lib/action_controller/metal/instrumentation.rb:32:in `block in process_action'
activesupport (4.1.12) lib/active_support/notifications.rb:159:in `block in instrument'
activesupport (4.1.12) lib/active_support/notifications/instrumenter.rb:20:in `instrument'
activesupport (4.1.12) lib/active_support/notifications.rb:159:in `instrument'
actionpack (4.1.12) lib/action_controller/metal/instrumentation.rb:30:in `process_action'
actionpack (4.1.12) lib/action_controller/metal/params_wrapper.rb:250:in `process_action'
activerecord (4.1.12) lib/active_record/railties/controller_runtime.rb:18:in `process_action'
actionpack (4.1.12) lib/abstract_controller/base.rb:136:in `process'
actionview (4.1.12) lib/action_view/rendering.rb:30:in `process'
actionpack (4.1.12) lib/action_controller/metal.rb:196:in `dispatch'
actionpack (4.1.12) lib/action_controller/metal/rack_delegation.rb:13:in `dispatch'
actionpack (4.1.12) lib/action_controller/metal.rb:232:in `block in action'
actionpack (4.1.12) lib/action_dispatch/routing/route_set.rb:82:in `dispatch'
actionpack (4.1.12) lib/action_dispatch/routing/route_set.rb:50:in `call'
actionpack (4.1.12) lib/action_dispatch/routing/mapper.rb:45:in `call'
actionpack (4.1.12) lib/action_dispatch/journey/router.rb:73:in `block in call'
actionpack (4.1.12) lib/action_dispatch/journey/router.rb:59:in `call'
actionpack (4.1.12) lib/action_dispatch/routing/route_set.rb:692:in `call'
meta_request (0.3.4) lib/meta_request/middlewares/app_request_handler.rb:13:in `call'
meta_request (0.3.4) lib/meta_request/middlewares/meta_request_handler.rb:13:in `call'
bullet (4.14.0) lib/bullet/rack.rb:12:in `call'
rack-attack (4.2.0) lib/rack/attack.rb:104:in `call'
warden (1.2.3) lib/warden/manager.rb:35:in `block in call'
warden (1.2.3) lib/warden/manager.rb:34:in `call'
rack (1.5.5) lib/rack/etag.rb:23:in `call'
rack (1.5.5) lib/rack/conditionalget.rb:35:in `call'
rack (1.5.5) lib/rack/head.rb:11:in `call'
actionpack (4.1.12) lib/action_dispatch/middleware/params_parser.rb:27:in `call'
actionpack (4.1.12) lib/action_dispatch/middleware/flash.rb:254:in `call'
rack (1.5.5) lib/rack/session/abstract/id.rb:225:in `context'
rack (1.5.5) lib/rack/session/abstract/id.rb:220:in `call'
actionpack (4.1.12) lib/action_dispatch/middleware/cookies.rb:562:in `call'
activerecord (4.1.12) lib/active_record/query_cache.rb:36:in `call'
activerecord (4.1.12) lib/active_record/connection_adapters/abstract/connection_pool.rb:621:in `call'
activerecord (4.1.12) lib/active_record/migration.rb:380:in `call'
actionpack (4.1.12) lib/action_dispatch/middleware/callbacks.rb:29:in `block in call'
activesupport (4.1.12) lib/active_support/callbacks.rb:82:in `run_callbacks'
actionpack (4.1.12) lib/action_dispatch/middleware/callbacks.rb:27:in `call'
actionpack (4.1.12) lib/action_dispatch/middleware/reloader.rb:73:in `call'
actionpack (4.1.12) lib/action_dispatch/middleware/remote_ip.rb:76:in `call'
better_errors (1.1.0) lib/better_errors/middleware.rb:84:in `protected_app_call'
better_errors (1.1.0) lib/better_errors/middleware.rb:79:in `better_errors_call'
better_errors (1.1.0) lib/better_errors/middleware.rb:56:in `call'
rack-contrib (1.2.0) lib/rack/contrib/response_headers.rb:17:in `call'
meta_request (0.3.4) lib/meta_request/middlewares/headers.rb:16:in `call'
actionpack (4.1.12) lib/action_dispatch/middleware/debug_exceptions.rb:17:in `call'
actionpack (4.1.12) lib/action_dispatch/middleware/show_exceptions.rb:30:in `call'
railties (4.1.12) lib/rails/rack/logger.rb:38:in `call_app'
railties (4.1.12) lib/rails/rack/logger.rb:20:in `block in call'
activesupport (4.1.12) lib/active_support/tagged_logging.rb:68:in `block in tagged'
activesupport (4.1.12) lib/active_support/tagged_logging.rb:26:in `tagged'
activesupport (4.1.12) lib/active_support/tagged_logging.rb:68:in `tagged'
railties (4.1.12) lib/rails/rack/logger.rb:20:in `call'
quiet_assets (1.0.3) lib/quiet_assets.rb:23:in `call_with_quiet_assets'
actionpack (4.1.12) lib/action_dispatch/middleware/request_id.rb:21:in `call'
rack (1.5.5) lib/rack/methodoverride.rb:21:in `call'
rack (1.5.5) lib/rack/runtime.rb:17:in `call'
activesupport (4.1.12) lib/active_support/cache/strategy/local_cache_middleware.rb:26:in `call'
rack (1.5.5) lib/rack/lock.rb:17:in `call'
actionpack (4.1.12) lib/action_dispatch/middleware/static.rb:84:in `call'
rack (1.5.5) lib/rack/sendfile.rb:112:in `call'
railties (4.1.12) lib/rails/engine.rb:514:in `call'
railties (4.1.12) lib/rails/application.rb:144:in `call'
rack (1.5.5) lib/rack/lock.rb:17:in `call'
rack (1.5.5) lib/rack/content_length.rb:14:in `call'
rack (1.5.5) lib/rack/handler/webrick.rb:60:in `service'
() Users/jaime/.rvm/rubies/ruby-2.1.5/lib/ruby/2.1.0/webrick/httpserver.rb:138:in `service'
() Users/jaime/.rvm/rubies/ruby-2.1.5/lib/ruby/2.1.0/webrick/httpserver.rb:94:in `run'
() Users/jaime/.rvm/rubies/ruby-2.1.5/lib/ruby/2.1.0/webrick/server.rb:295:in `block in start_thread'