Correct answer - "Double check your IAM permissions for CodeBuild service" : By default, IAM
users don't have permission to create or modify Amazon ECR resources, or perform tasks using the
Amazon ECR API.
Incorrect:
"Delete and re-create ECR repositories" - You can but all your images in it will be deleted. Also
you will experience the same issue as before because this is an authorization issue
"Open an AWS support ticket" - Before you do always check IAM permissions when dealing with
authorization issues
"You first need to run an ECS instance" - This will not help resolve the issue