Why doesn't Heroku show the Rails default page?

Following chapter (1) of the Ruby on Rails tutorial:
http://railstutorial.org/, I was able to successfuly push the
application to "Heroku" using:

git push heroku master

But, when I open the website, I get a page with the following:

App crashed
This application is temporarily offline.
If you're the administrator of this app, please check your heroku logs
for the backtrace.

Why is that? And, why don't I see the default Rails page?

Thanks.

I presume you checked the heroku logs as instructed. What did they say?

Colin

u know why it is happening..
heroku uses postgresql as default..
so if u r using sqlite3 u should disable that..
u can do that by commenting one single line in ur gemfile
that will like gem require=>sqlite3 or something like that...
then do:

heroku config:add BUNDLE_WITHOUT="development:test"

then again commit and push it to heroku...i am sure ur application
will definitely work...

venkata reddy wrote in post #967814:

u know why it is happening..
heroku uses postgresql as default..
so if u r using sqlite3 u should disable that..
u can do that by commenting one single line in ur gemfile
that will like gem require=>sqlite3 or something like that...
then do:

heroku config:add BUNDLE_WITHOUT="development:test"

then again commit and push it to heroku...i am sure ur application
will definitely work...

Thanks a lot all for your replies.

It worked when I did this in the Gemfile (Based on
http://railstutorial.org/ruby-on-rails-tutorial-book)

gem 'sqlite3-ruby', :require => 'sqlite3', :group => :developmen