RNTester doesn't work

🐛 Bug Report

I can’t force to work your sample RNTester according to manual https://github.com/facebook/react-native/tree/master/RNTester

To Reproduce

1. git clone https://github.com/facebook/react-native.git. It’s OK!
2. cd react-native
3. npm install. It’s OK, but shows some warnings:

npm WARN @react-native-community/cli@1.4.2 requires a peer of react-native@^0.59.0 but none is installed. You must install peer dependencies yourself.
npm WARN eslint-config-fbjs@2.0.1 requires a peer of babel-eslint@^7.2.3 but none is installed. You must install peer dependencies yourself.
npm WARN eslint-config-fbjs@2.0.1 requires a peer of eslint@^4.2.0 but none is installed. You must install peer dependencies yourself.
npm WARN eslint-config-fbjs@2.0.1 requires a peer of eslint-plugin-babel@^4.1.1 but none is installed. You must install peer dependencies yourself.
npm WARN eslint-config-fb-strict@22.1.0 requires a peer of babel-eslint@^7.2.3 || ^8.0.0 but none is installed. You must install peer dependencies yourself.
npm WARN eslint-config-fb-strict@22.1.0 requires a peer of eslint@^4.2.0 but none is installed. You must install peer dependencies yourself.
npm WARN eslint-config-fb-strict@22.1.0 requires a peer of eslint-plugin-babel@^4.1.1 but none is installed. You must install peer dependencies yourself.
npm WARN eslint-plugin-react@7.8.2 requires a peer of eslint@^3.0.0 || ^4.0.0 but none is installed. You must install peer dependencies yourself.
npm WARN eslint-plugin-jsx-a11y@6.0.3 requires a peer of eslint@^3 || ^4 but none is installed. You must install peer dependencies yourself.
npm WARN jest-resolve-dependencies@24.5.0 requires a peer of jest-haste-map@^24.0.0 but none is installed. You must install peer dependencies yourself.
npm WARN jest-snapshot@24.5.0 requires a peer of jest-haste-map@^24.0.0 but none is installed. You must install peer dependencies yourself.
npm WARN jest-resolve@24.5.0 requires a peer of jest-haste-map@^24.0.0 but none is installed. You must install peer dependencies yourself.
npm WARN The package jest-junit is included as both a dev and production dependency.
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@1.2.7 (node_modules/fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@1.2.7: wanted {"os":"darwin","arch":"any"} (current: {"os":"linux","arch":"x64"})

1. Prerequisites steps (https://facebook.github.io/react-native/docs/building-from-source.html#android): a) Set ANDROID_SDK and ANDROID_NDK (in ~/.bash_profile). b) Create RNTester/android/local.properties (with sdk.dir and ndk.dir properties within).
2. ./gradlew :RNTester:android:app:installDebug. It’s OK. Apk was installed on my android STB device.
3. ./scripts/packager.sh. It’s FAILED. Output: error Unable to find React Native files. Make sure "react-native" module is installed in your project dependencies.

Then I open installed RNTesterApp on my device:

Logcat error:

03-14 23:09:49.718 E/unknown:ReactNative(20905): Exception in native call
03-14 23:09:49.718 E/unknown:ReactNative(20905): java.lang.RuntimeException: Unable to load script. Make sure you're either running a Metro server (run 'react-native start') or that your bundle 'RNTesterApp.android.bundle' is packaged correctly for release.
03-14 23:09:49.718 E/unknown:ReactNative(20905): 	at com.facebook.react.bridge.CatalystInstanceImpl.jniLoadScriptFromAssets(Native Method)
03-14 23:09:49.718 E/unknown:ReactNative(20905): 	at com.facebook.react.bridge.CatalystInstanceImpl.loadScriptFromAssets(CatalystInstanceImpl.java:218)
03-14 23:09:49.718 E/unknown:ReactNative(20905): 	at com.facebook.react.bridge.JSBundleLoader$1.loadScript(JSBundleLoader.java:31)
03-14 23:09:49.718 E/unknown:ReactNative(20905): 	at com.facebook.react.bridge.CatalystInstanceImpl.runJSBundle(CatalystInstanceImpl.java:247)
03-14 23:09:49.718 E/unknown:ReactNative(20905): 	at com.facebook.react.ReactInstanceManager.createReactContext(ReactInstanceManager.java:1152)
03-14 23:09:49.718 E/unknown:ReactNative(20905): 	at com.facebook.react.ReactInstanceManager.access$900(ReactInstanceManager.java:123)
03-14 23:09:49.718 E/unknown:ReactNative(20905): 	at com.facebook.react.ReactInstanceManager$5.run(ReactInstanceManager.java:943)
03-14 23:09:49.718 E/unknown:ReactNative(20905): 	at java.lang.Thread.run(Thread.java:818)

Then I close RNTesterApp and run it again. It shows only white screen. Logcat:

03-14 23:31:21.125 W/unknown:ReconnectingWebSocket(20905): Couldn't connect to "ws://localhost:8081/message?device=p212%20-%206.0.1%20-%20API%2023&app=com.facebook.react.uiapp&clientid=DevSupportManagerImpl", will silently retry

Environment

Ubuntu 18.04.2 LTS Android 6.0.1

[cdskill]

any solution ? I encountered probably the same issue …

[grabbou]

Have you started packager? Run yarn start from root of React Native.