Why can't I add Heroku Connect danketsu or paid plan?

Resolution

It is not possible to provision the paid plan (danketsu) directly. Instead, one should provision the demo plan.

$ heroku addons:create herokuconnect:demo

The demo plan will be upgraded automatically to the paid plan only after you have accessed the Heroku Connect dashboard for the first time via the 'addons:open' CLI command.

$ heroku addons:open herokuconnect

If it doesn't automatically upgrade, ensure your application belongs to a Heroku Organization that has the Connect entitlement.