AWS CDK，获取无效的semver字符串：“”；未定义”；

学习AWS CDK和Typescript的Udemy教程。这段视频大约有两年的历史，讲师刚刚开始使用新的2.0.0版本的cdk。所以，这是我问题的一部分。运行cdk-synth时，我收到以下错误--verbose

    Invalid semver string: "undefined"
[21:30:22] Error: Invalid semver string: "undefined"
    at parseVersion (C:\Users\DREWA\AppData\Roaming\npm\node_modules\aws-cdk\lib\index.js:31:8255000)
    at Function.validate (C:\Users\DREWA\AppData\Roaming\npm\node_modules\aws-cdk\lib\index.js:31:8255125)
    at Function.loadManifest (C:\Users\DREWA\AppData\Roaming\npm\node_modules\aws-cdk\lib\index.js:32:594)
    at Function.loadAssemblyManifest (C:\Users\DREWA\AppData\Roaming\npm\node_modules\aws-cdk\lib\index.js:31:8254222)
    at new CloudAssembly (C:\Users\DREWA\AppData\Roaming\npm\node_modules\aws-cdk\lib\index.js:32:14396)
    at createAssembly (C:\Users\DREWA\AppData\Roaming\npm\node_modules\aws-cdk\lib\index.js:329:15973)
    at execProgram (C:\Users\DREWA\AppData\Roaming\npm\node_modules\aws-cdk\lib\index.js:329:15438)
    at processTicksAndRejections (internal/process/task_queues.js:95:5)
    at async Object.CloudExecutable.synthesizer (C:\Users\DREWA\AppData\Roaming\npm\node_modules\aws-cdk\lib\index.js:385:50431)
    at async CloudExecutable.doSynthesize (C:\Users\DREWA\AppData\Roaming\npm\node_modules\aws-cdk\lib\index.js:329:7689)

我不知道我需要一个manifest.json文件，直到我在运行“cdk-synth”时事先得到了一个没有找到的错误。不知道里面应该有什么，所以我从AWS下载了一个示例。以下是内容

{
    "default": {
      "version": "v0.0.1",
      "telemetry": {
        "deploy": true,
        "env": {
          "telemetryTopic": "smartproduct/telemetry"
        }
      },
      "events": {
        "deploy": true,
        "env": {
          "eventTopic": "smartproduct/event"
        }
      },
      "jitr": {
        "deploy": true
      },
      "api": {
        "deploy": true
      },
      "ownerapp": {
        "deploy": true
        }
      }
    }

以下是版本：Node:v14.17.6

净现值：6.14.15

aws cdk:2.63.2

在Stack Overflow、github或AWS中找不到有关此特定错误和场景的任何帮助。有没有一种方法可以在不需要manifest.json的情况下运行cdk-synth？