Unable to load script from assets index.android.bundle

Sometimes when we open a React Native app, this issue appears: "Unable to load script from assets 'index.android.bundle'".

I faced this issue when I installed a new React Native project to replace my old complete project. Without making any changes, I copied the entire content of the old project's AndroidManifest.xml file and pasted it into the new project's Androidmanifest.xml file.

After that, this same error started appearing: "Unable to load script from assets 'index.android.bundle'".

I tried several times but couldn’t fix it. Then somehow, while checking, I found that one line was missing, and that line was:android:usesCleartextTraffic="${usesCleartextTraffic}"

So, I added this line inside the <application> tag like this:

<application

android:name=".MainApplication"

android:label="@string/app_name"

android:icon="@mipmap/ic_launcher"

android:roundIcon="@mipmap/ic_launcher"

android:allowBackup="false"

android:theme="@style/SplashTheme"

android:usesCleartextTraffic="${usesCleartextTraffic}"

android:supportsRtl="true"

tools:replace="android:appComponentFactory"

android:appComponentFactory="androidx.core.app.CoreComponentFactory">

And my problem got solved, and now my app is running properly.