Error with deployment with cloud IDE in Heroku


Hi everyone,
I am working on Ch.1 Ruby on Rails tutorial (Rails 5) with cloud IDE
I have the problem with deploying with Heroku. The last command
$ git push heroku master
produces an error message and
remote: ! No such app as murmuring-atoll-61945.
fatal: repository ‘’ not found
When I visit the address when you ran heroku create
it did not deploy hello_app.