actioncable

The default behavior for ActionCable in development mode is to use the async adapter, which operates within the same process only. For inter-process broadcasting, you will need to switch to the redis adapter. To enable redis in development mode, you will need to edit config/cable.yml: redis: &redis adapter: redis url: redis://localhost:6379/1 production: *redis development: *redis … Read more

You can put Rails.application.config.action_cable.allowed_request_origins = [‘http://localhost:3001’] in your development.rb See https://github.com/rails/rails/tree/master/actioncable#allowed-request-origins for more informations