At some point the AWS CLI client changed the command it wants you to use for authenticating a Docker engine with Elastic Container Repository. Previously you would call

eval $(aws ecr get-login --no-include-email --region us-east-1 --profile=$PROFILE)

Where the new syntax requires this instead:

aws ecr get-login-password --region us-east-1 --profile=$PROFILE | docker login --username AWS --password-stdin <DNS-OF-ECR-REPO>

All of the SimplyE build and deploy jobs need to be reviewed to make sure this change is present, to make sure built images can still be pushed to ECR.