React Native: Cannot connect device to packager (npm start)

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I just started to give React Native a try. I followed the tutorial, changed localhost to my MacBook’s IP address, but for some reason, I couldn’t connect my device (iPhone 5) to the React packager server, which I started via npm start in the React project’s root directory.

The error in Xcode was a timeout:
2016-06-22 17:03:37.615 [error][tid:main][RCTWebSocketManager.m:84] WebSocket connection failed with error Error Domain=NSPOSIXErrorDomain Code=60 "Operation timed out"

I noticed that I couldn’t open the packager server from Safari on the device as well (, which I found odd.

Then I tried to find a solution for the search term ios safari connect local webserver and this is the answer:

If your iOS device can’t connect to the React Native packager server, although everything is set up flawlessly, JUST DISABLE AND ENABLE YOUR MAC’S WIFI.

Stupid thing, but it works. I just wasted an hour on this 😤