Bugs in older agent versions are a frequent culprit. You can automate this using the AWS-UpdateSSMAgent document.
Ensure that you don't have overlapping AWS Systems Manager Maintenance Windows or State Manager associations targeting the same instance. Bugs in older agent versions are a frequent culprit
If your instance is in a private subnet without proper VPC endpoints or if a proxy is blocking outbound traffic to SSM or S3, the agent cannot download the snapshot file. check Maintenance Windows and State Manager
If the error persists, the local logs will provide a more detailed traceback. Troubleshooting Patch Manager - AWS Documentation Bugs in older agent versions are a frequent culprit
Navigate to the Systems Manager Console , check Maintenance Windows and State Manager , and ensure their schedules do not conflict. 2. Verify IAM Instance Profile