dotnet2 最小 Lambda 抛出 200 与 Object 参考未设置错误

Question

我正在尝试使用 API 网关设置一个简单的 Lambda 前端，但无论我如何配置网关或发起请求，我都会经常遇到此错误。 这是我的步骤：

1. 具有 dotnet 6 最小 Lambda API 的脚手架计算器项目： dotnet new serverless.AspNetCoreMinimalAPI -n DemoCalc
2. 打开Program.cs并将LambdaEventSource.RestApi更改为LambdaEventSource.HttpApi
3. Hit F5 and test the Lambda locally in Postman by hitting localhost:5001 and seeing Welcome to running ASP.NET Core Minimal API on AWS Lambda in the response body
4. 在 AWS 控制台中创建一个新的 Lambda function，其中只有以下属性偏离默认值：

Function name: DemoCalc
Runtime: .NET 6
Advanced settings > Enable function URL: Checked
Advanced settings > Auth type: NONE

5. 在 Lambda 控制台中，在运行时设置下，单击编辑并将处理程序值更改为DemoCalc ，然后单击保存
6. 添加具有这些值的触发器：

Source: API Gateway
Create a new API: Checked
API type: REST API
Security: Open

5. 通过导航到生成的\DemoCalc\src\DemoCalc文件夹并执行dotnet lambda deploy-function DemoCalc -frun dotnet6将 Lambda 项目部署到 AWS
6. At the top of the Lambda console, copy the Function URL value and test in Postman, seeing Welcome to running ASP.NET Core Minimal API on AWS Lambda in the response body
7. 打开 API 网关控制台，单击 DemoCalc，select ANY资源并单击 TEST
8. Select Method: GET并点击测试

测试 output 和 CloudWatch 日志组中显示以下内容：

Endpoint response body before transformations: {
  "errorType": "NullReferenceException",
  "errorMessage": "Object reference not set to an instance of an object.",
  "stackTrace": [
    "at Amazon.Lambda.AspNetCoreServer.APIGatewayHttpApiV2ProxyFunction.MarshallRequest(InvokeFeatures features, APIGatewayHttpApiV2ProxyRequest apiGatewayRequest, ILambdaContext lambdaContext)",
    "at Amazon.Lambda.AspNetCoreServer.AbstractAspNetCoreFunction`2.FunctionHandlerAsync(TREQUEST request, ILambdaContext lambdaContext)",
    "at Amazon.Lambda.RuntimeSupport.HandlerWrapper.<>c__DisplayClass26_0`2.<<GetHandlerWrapper>b__0>d.MoveNext()",
    "--- End of stack trace from previous location ---",
    "at Amazon.Lambda.RuntimeSupport.LambdaBootstrap.InvokeOnceAsync(CancellationToken cancellationToken)"
  ]
}

Lambda execution failed with status 200 due to customer function error: Object reference not set to an instance of an object.. Lambda request id: 065208ae-f219-4920-a450-f0474f27b474

Method completed with status: 502

通过 API 网关让这个工作我缺少什么？