Unable to load script from assets index.android.bundle on windows

Question

I\'m trying to run my first React Native project for first time on my device (Android 4.2.2).

And I get:

unable to load script from assets in

Answer 1

If when running react-native run-android command the second line of the trace is

JS server not recognized, continuing with build...

it means packager for the app cannot be started and the app will fail to load without some extra steps. Note that the end of the trace still reports success:

BUILD SUCCESSFUL

The problem is probably some port conflict (in my case it was the default IIS site that I completely forgot about). Another manifestation of the problem would be a failure to open http://localhost:8081/debugger-ui URL in Chrome.

Once the port conflict is resolved the trace will report

Starting JS server...

then an additional Node window will open (node ...cli.js start) and the app will load/reload successfully.

After that you should be able to open debug console in Chrome with http://localhost:8081/debugger-ui.