Can't proxy from localhost:3000 to localhost:7000 without internet connection

Created by: rksh1997

In my client's package.json. "proxy": "http://localhost:7000" with internet connection everything is fine and the api works awesome. without internet connection it shows me this error: Could not proxy request /api/users/signup from localhost:3000 to http://localhost:7000 (ENOENT). the problem is that mot of my time I am offline.