Postmanのエラーに基づいて

Postmanのエラー:

Could not get any responseエラー

Could not get any response
There was an error connecting to http://127.0.0.1:8888/api/private/v1/login.
Why this might have happened:
The server couldn't send a response:
Ensure that the backend is working properly
Self-signed SSL certificates are being blocked:
Fix this by turning off 'SSL certificate verification' in Settings > General
Proxy configured incorrectly
Ensure that proxy is configured correctly in Settings > Proxy
Request timeout:
Change request timeout in Settings > General

理由:インタフェースファイルappを開くためである.js
解決方法:
APIプロジェクトでshift+右クリックで開くコマンドライン入力:node app実行

エラー解決!