AWS EC2 Image Builder: Action failed for step LaunchBuildInstance. Retry attempt: X

Question

Working with AWS EC2 Image Builder Created the role as per the documentation. Built a custom Ubuntu AMI, everything worked fine.

Building a custom Windows AMI and it's stuck on LaunchBuildInstance step. Log shows:

Action failed for step LaunchBuildInstance. Retry attempt: X

Waiting 90 seconds, retrying and failing. No additional information in the logs

EC2 Build instance is running and I can connect to the Build Instance through the console, run PowerShell with no problem. I see the AWS SSM agent is running.

Pipeline created with:

• Default image workflow
• Infrastructure configuration - Create using service defaults

Using a basic custom recipe that doesn't have much, just download a PS script from S3 and run it, taken from AWS documentation samples. It's not even getting to this point.