CloudFormation create change set fails with ‘Template parameters modified by transform’

I hope this saves someone some headaches one day.

This is currently a known issue with CloudFormation in which you need to provide the VPC and Subnets as parameters to the stack when using AWS::CodeDeployBlueGreen Transform.

Parameters:
  VPC:
    Type: AWS::EC2::VPC::Id
  Subnet1:
    Type: AWS::EC2::Subnet::Id
  Subnet2:
    Type: AWS::EC2::Subnet::Id