Fails to run the command according to the section "Running locally"

[jianingwang123]

Describe the issue:
When run the command dotnet run --project ./app/backend/MinimalApi.csproj --urls=http://localhost:7181/ according to the section "Running locally" of README.md , the terminal shows the error as follow.

Environment:

• Readme - Codespaces Deployment/ Dev Containers Deployment

Repro Steps:
1.Run azd auth login
2.After the application deploys, set the environment variable AZURE_KEY_VAULT_ENDPOINT.
3.Run dotnet run --project ./app/backend/MinimalApi.csproj --urls=http://localhost:7181/.

Expected behavior:
Run command dotnet run --project ./app/backend/MinimalApi.csproj --urls=http://localhost:7181/ successfully.

@charris-msft to notification.