Hi @rseshadri ,

I'm more familiar with Azure, but this error is most commonly caused by entering the wrong credentials in the Cloudformation template.

Try to launch the Quickstart again from the Databricks Account Console and double check that you enter the email/password of your Databricks account in the Cloudformation template.

Be aware that the browser will often try to auto-fill these fields with the AWS credentials, so please double check the fields.