meteor android app

I tried the react demo with meteor run android
it says

I20190510-23:35:40.409(2)? 05-10 23:35:24.782 4214 4214 I chromium: [INFO:CONSOLE(1)] "Uncaught SyntaxError: Unexpected token <", source: http://localhost:12296/app.js (1)

Start with the React demo and the `meteor run android` entry point, then inspect how `app.js` is served to the Android app. Reproduce the console error and determine why the response at `http://localhost:12296/app.js` produces an unexpected `<`; done means the demo loads without this syntax error.

Written by the indexing model from the issue text.