Switched to new computer, now I can't open our app using Expo Go: "127.0.0.1 refused to connect"

[rxprmchs]

Android device

Problem:

• I’m working on a new laptop and I can’t open any expo/react native projects using Expo Go. I tried scanning the QR code that is in ‘Tunnel’, ‘LAN’, ‘Local’ and I still can’t connect to the development server.

What I’ve tried so far:

• Install/Uninstall expo cli/nodejs
• Set Execution-Policy to Unrestricted
• Added REACT_NATIVE_PACKAGER_HOSTNAME in Environment Variables>System Variables(I’m not familiar with this one, but it seems that it doesn’t do anything or I’ve applied it wrong)
• Turn off all firewall

node v16.14.2
expo v5.3.0

[adamjnav]

Hey @rxprmchs, can you try clearing your caches and also share what expo diagnostics spits out here?

[rxprmchs]

Hi everyone! It seems that adding REACT_NATIVE_PACKAGER_HOSTNAME(Replacing 127.0.0.1 with my actual IP) in the environment variable does not do the trick, but setting it inside the “app/project’” works for me.

I opened our project in VSCode > Open new terminal > then execute:

set REACT_NATIVE_PACKAGER_HOSTNAME={added my/your IP here}

After that, I run npm/expo start and it showed my IP in the link instead of 127.0.0.1 and I can now connect to the development server!

[rxprmchs]

Hi! Already cleared my cache and even removed node_modules and package.lock. But I’ve already found a solution.

[wodin]

You could also try:

expo start --lan