unable to load script from assets 'index.android.bundle' .

[FebinRukfan]

Honestly, I'm very new to react-native.

The Git-bash shell says

Installing APK 'app-debug.apk' on 'Nexus_5X_API_23(AVD) - 6.0' for app:debug
Installed on 1 device.

BUILD SUCCESSFUL

Total time: 1 mins 8.812 secs
'adb' is not recognized as an internal or external command,
operable program or batch file.
Starting the app (C:\Android\sdk/platform-tools/adb shell am start -n com.relaxationstation/com.relaxationstation.MainActivity...
Starting: Intent { cmp=com.relaxationstation/.MainActivity }
events.js:182
throw er; // Unhandled 'error' event
^

Error: spawn cmd.exe ENOENT
at _errnoException (util.js:1022:11)
at Process.ChildProcess._handle.onexit (internal/child_process.js:192:19)
at onErrorNT (internal/child_process.js:374:16)
at _combinedTickCallback (internal/process/next_tick.js:138:11)
at process._tickCallback (internal/process/next_tick.js:180:9)

OS: Windows10
react-native-cli: 2.0.1
react-native: 0.47.1
node: 8.3.0
npm: 5.5.1

node: 8.3.0
npm: 5.5.1

[react-native-bot]

@facebook-github-bot no-template

[facebook-github-bot]

Hey, thanks for reporting this issue! It looks like your description is missing some necessary information, or the list of reproduction steps is not complete. Can you please add all the details specified in the Issue Template? This is necessary for people to be able to understand and reproduce the issue being reported. I am going to close this, but feel free to open a new issue with the additional information provided. Thanks! See "What to Expect from Maintainers" to learn more.