Facing issue on Heroku deployment

I am getting an error on heroku deployment. It was working before suddenly not working
Please check the attached screenshot.

Here is the setup-heroku.sh

#!/bin/bash
git remote add heroku $HEROKU_GIT_CANARY_URL
wget -qO- https://toolbelt.heroku.com/install-ubuntu.sh | sh
cat > ~/.netrc << EOF
machine api.heroku.com
  login $HEROKU_EMAIL
  password $HEROKU_TOKEN
machine git.heroku.com
  login $HEROKU_EMAIL
  password $HEROKU_TOKEN
EOF