CDK deployment failed

[xunyud]

Describe the bug
A clear and concise description of what the bug is.
When deploying with CDK, the code structure in the README seems different from the provided source code, and the manifest.yaml file is missing.

To Reproduce
Following the documentation and readme, when running 'cdk synth', it cannot proceed and reports the following error message
Subprocess exited with error 1
[07:00:58] Error: Subprocess exited with error 1
at ChildProcess. (/usr/lib/nodejs20/lib/node_modules/aws-cdk/lib/index.js:423:50595)
at ChildProcess.emit (node:events:524:28)
at ChildProcess.emit (node:domain:489:12)
at ChildProcess._handle.onexit (node:internal/child_process:293:12)

Expected behavior
A clear and concise description of what you expected to happen.

Please complete the following information about the solution:

• Version: [e.g. v1.0.0]

(SO0276) - generative-ai-application-builder-on-aws - DeploymentPlatformStack - Version v4.0.2

• [ us-east-2] Region: [e.g. us-east-1]
• Was the solution modified from the version published on this repository?
• If the answer to the previous question was yes, are the changes available on GitHub?
• Have you checked your service quotas for the sevices this solution uses?
• Were there any errors in the CloudWatch Logs?

Screenshots
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Additional context
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