SessionManagerPlugin is not found

[joelchen]

$ aws --version
aws-cli/2.31.32 Python/3.13.9 Linux/6.12.48+deb13-amd64 exe/x86_64.debian.13
$ aws ssm start-session --target i-00000000000000000 --region ap-northeast-1 --profile 000000000000_CDK

SessionManagerPlugin is not found. Please refer to SessionManager Documentation here: http://docs.aws.amazon.com/console/systems-manager/session-manager-plugin-not-found

Container instance running Bottlerocket with AMI bottlerocket-aws-ecs-1-aarch64-v1.43.0-c71bcbe9, no problem starting a session from AWS SSM's Session Manager.