[Solved] Heroku and Github : Items could not be retrieved, Internal server error

This feature is currently disabled while Heroku investigates a security breach:

To mitigate impact from potentially compromised OAuth tokens, we will revoke over the next several hours all existing tokens from the Heroku GitHub integration. We are also preventing new OAuth tokens from being created until further notice. Your GitHub repositories will not be affected in any way by this action.

As of 2022-04-17 18:58 UTC, it appears that this will not be resolved anytime soon:

Until further notice, we will not issue OAuth tokens from the Heroku Dashboard. These actions, based on our current understanding of the issue, should prevent unauthorized access to your GitHub repositories.

I suggest you use one of Heroku’s other deployment options instead, e.g. git pushing directly to Heroku.

This is due to an issue reported at their status portal, here.

For now, the solution is to use another pushing strategy.
The best one, for now, is using their remote with Heroku CLI. The steps for it are:

1. Install the Heroku CLI if not yet installed

Further information about installation and setup can get here

2. Perform login with the heroku login command

You will be prompted with your default browser window for completing the login at the Heroku portal.

3. Assuming you already have your app set up at Heroku (if not, please follow this), you just need to add a new remote for your git repo with Heroku CLI.

Run heroku git:remote -a example-app – substitute “example-app” with your app name.

4. git remote -v to check if the remote has been set successfully

You should see something like this appear as a response

heroku  https://git.heroku.com/your-app-name.git (fetch)
heroku  https://git.heroku.com/your-app-name.git (push)

5. Push your branch to the new heroku remote

git push heroku your_branch_name

6. You should see the progress of your deployment being displayed in the terminal

The reference for this answer has been taken from here, which can also be used if further information other than the one provided in this answer is needed.

I’m in the same situation and, as others stated, it’s due to an Heroku security issue. In the meantime you can deploy your code by using the Heroku CLI.
So, on the Heroku web dashboard select Heroku Git
then setup the Heroku CLI with heroku login.

Finally, if your repository already exist on github, you need to add a new remote by running

heroku git:remote -a your_app_name
git push heroku master

you can find more information about this solution in the official documentation link

It is just a temporary thing, more details about this issue are here

You could push to both GitHub and Heroku at once for a temporary solution

git push -u heroku <branch>
git push -u origin <branch>