After creating a new CF stack by following the steps detailed in the README, creating WebappLaunchConfig fails with the following error:
Resource handler returned message: "The Launch Configuration creation operation is not available in your account. Use launch templates to create configuration templates for your Auto Scaling groups. (Service: AutoScaling, Status Code: 400, Request ID: d2598c07-34db-4d46-bf20-670d9e73629d)"
As per the auto-scaling user guide, launch configs cannot be created anymore with new EC2 instance types or by new accounts, and migrating to launch templates is the recommended way going forward.