New project setup, but didn't work

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The react-native project was newly installed.
After that, react-native-webrtc was installed with yarn.
And I ran the android emulator with the yarn android command.
Result is app crashed.
I just installed and set the permissions in AndroidManifest.xml file as below.

    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <uses-permission android:name="android.permission.BLUETOOTH" />
    <uses-permission android:name="android.permission.CAMERA" />
    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" />
    <uses-permission android:name="android.permission.RECORD_AUDIO" />
    <uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />
    <uses-permission android:name="android.permission.WAKE_LOCK" />

So, I downloaded the example folder and installed.
The same phenomenon occurred when using yarn add react-native-webrtc without using postinstall.
So, when I postinstall again, it worked.

Can you check what’s wrong?

package.json

  "dependencies": {
    "react": "16.13.1",
    "react-native": "0.63.4",
    "react-native-webrtc": "^1.87.2"
  },
  "devDependencies": {
    "@babel/core": "^7.12.10",
    "@babel/runtime": "^7.12.5",
    "@react-native-community/eslint-config": "^2.0.0",
    "babel-jest": "^26.6.3",
    "eslint": "^7.17.0",
    "jest": "^26.6.3",
    "metro-react-native-babel-preset": "^0.64.0",
    "react-test-renderer": "16.13.1"
  },

android emulator

  • Android 10.0(Google Play) / Q
  • Pixel 4 API 29