Unable to load script.Make sure you are either running a Metro server ( React Native )

when i open 2 terminal

1. npx react-native start
2. npx react-native run-android

actually there are no error while running run-android,
but at the first window, metro bundler doesn't work

1. I try to delete the application from device / emulator, doesn't work at all
2. I try delete .gradle folder and run ./gradlew clean, and try to run again but still show the same issue

I have fix this issue by removing this line:

android:networkSecurityConfig="@xml/network_security_config"

From app/src/main/AndroidManifest.xml