[Solved] Google Admob "Missing Application ID" Error

    Add meta-data below <application> tag

     

    ex

     <application
            android:label="myApplication"
            android:name="${applicationName}"
            android:icon="@mipmap/ic_launcher"
            android:usesCleartextTraffic="true">
            <meta-data
                android:name="com.google.android.gms.ads.APPLICATION_ID"
                android:value="ca-app-pub-===Yours====" />
            <activity
                android:name=".MainActivity"

     

    Not inside <activity> tag

     

     

     

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