React native android building app error

Help me plz ! I'm newbie in react native android learner. When i try to build my app this is what i got:

Error: EPERM: operation not permitted, lstat 'F:\react\templatephoto\android
app\build\generated\not_namespaced_r_class_sources\devKernelDebug\processDevKernelDebugResources\r\android\arch\core\R.java'
Emitted 'error' event at:
at NodeWatcher. (F:\react\templatephoto\node_modules\sane\src\node_watcher.js:306:14)
at F:\react\templatephoto\node_modules\graceful-fs\polyfills.js:282:31
at FSReqCallback.oncomplete (fs.js:165:21) {
errno: -4048,
code: 'EPERM',
syscall: 'lstat',
path: 'F:\react\templatephoto\android\app\build\generated\not_namespaced_r_class_sources\devKernelDebug\processDevKernelDebugResources\r\android\arch\core\R.java'
}

There are steps to build this app in to emulator device:

npm install
npm start

Open xcode or android studio build native project

How can i fix it ?