Error: JS server not recognized, continuing with build...

Command executed

$ react-native run-android

Error description

JS server not recognized, continuing with build... Building and installing the app on the device (cd android && ./gradlew installDebug)... Could not install the app on the device, read the error above for details. Make sure you have an Android emulator running or a device connected and have set up your Android development environment: https://facebook.github.io/react-native/docs/android-setup.html

Resolution#1

run these commands manually cd android ./gradlew installDebug if you get the erorr "-bash: ./gradlew: Permission denied", check the permissions on the file gradlew chmod 755 gradlew

Error: Application main has not been registered.

Hint:

This error often happens when you're running the packager (local dev server) from a wrong folder. For example you have multiple apps and the packager is still running for the app you were working on before. If this is the case, simply kill the old packager instance (e.g. close the packager terminal window) and start the packager in the correct app folder (e.g. cd into app folder and run 'npm start').

This error can also happen due to a require() error during initialization or failure to call AppRegistry.registerComponent.

runApplication AppRegistry.js:177:6 __callFunction MessageQueue.js:306:47 MessageQueue.js:108:26 __guard MessageQueue.js:269:6 callFunctionReturnFlushedQueue MessageQueue.js:107:17