Admob banner is not clickable

Hi, guys.
I got a strange problem.

First, I tested the Admob plugin.
It really shows the ad banner and clickable

this is the original Manifest_xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android" android:installLocation="preferExternal" package="com.example.admobtest" android:versionName="1.0" android:versionCode="1">
  <supports-screens android:smallScreens="true" android:normalScreens="true" android:largeScreens="true" android:xlargeScreens="true" android:anyDensity="true" />
  <!-- Google Mobile Ads Permissions -->
	<uses-permission android:name="android.permission.INTERNET" />
	<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
  <application android:icon="@drawable/app_icon" android:label="@string/app_name" android:debuggable="false">
    <!-- meta-data tag for Google Play services -->
    <meta-data android:name="com.google.android.gms.version" android:value="@integer/google_play_services_version"/>
	<activity android:name="com.unity3d.player.UnityPlayerProxyActivity" android:label="@string/app_name" android:configChanges="fontScale|keyboard|keyboardHidden|locale|mnc|mcc|navigation|orientation|screenLayout|screenSize|smallestScreenSize|uiMode|touchscreen" >
    <meta-data android:name="unityplayer.ForwardNativeEventsToDalvik" android:value="true" />
      <intent-filter>
        <action android:name="android.intent.action.MAIN" />
        <category android:name="android.intent.category.LAUNCHER" />
      </intent-filter>
    </activity>
    <activity android:name="com.unity3d.player.UnityPlayerActivity" android:label="@string/app_name" android:configChanges="fontScale|keyboard|keyboardHidden|locale|mnc|mcc|navigation|orientation|screenLayout|screenSize|smallestScreenSize|uiMode|touchscreen" >
    </activity>
    <activity android:name="com.unity3d.player.UnityPlayerNativeActivity" android:label="@string/app_name" android:configChanges="fontScale|keyboard|keyboardHidden|locale|mnc|mcc|navigation|orientation|screenLayout|screenSize|smallestScreenSize|uiMode|touchscreen" >
      <meta-data android:name="unityplayer.ForwardNativeEventsToDalvik" android:value="true" />
      <meta-data android:name="android.app.lib_name" android:value="unity" />
      
    </activity>
    <activity android:name="com.unity3d.player.VideoPlayer" android:label="@string/app_name" android:configChanges="fontScale|keyboard|keyboardHidden|locale|mnc|mcc|navigation|orientation|screenLayout|screenSize|smallestScreenSize|uiMode|touchscreen" >
    </activity>
    <!-- Google Mobile Ads Activity -->
	  <activity android:name="com.google.android.gms.ads.AdActivity"
              android:label="@string/app_name"
              android:configChanges="fontScale|keyboard|keyboardHidden|locale|mnc|mcc|navigation|orientation|screenLayout|screenSize|smallestScreenSize|uiMode|touchscreen">
    </activity>
  </application>
  <uses-feature android:glEsVersion="0x00020000" />
  <uses-sdk android:minSdkVersion="9" android:targetSdkVersion="19" />
</manifest>

But, after I combined the Admob and InAppbilling.
I made some change for the Manifest, and then the ad banner became unclickable.
Is here anything wrong?

<?xml version="1.0" encoding="utf-8"?>
<manifest android:versionCode="1" android:versionName="1.0.0"
          android:installLocation="preferExternal"
          package="com.playndora.plugins"
          xmlns:android="http://schemas.android.com/apk/res/android">
  <supports-screens android:anyDensity="true" android:smallScreens="true"
                    android:normalScreens="true" android:largeScreens="true"
                    android:xlargeScreens="true" />
  <application android:label="@string/app_name"
               android:icon="@drawable/app_icon" android:debuggable="false">
    <!-- meta-data tag for Google Play services -->
    <meta-data android:name="com.google.android.gms.version" android:value="@integer/google_play_services_version"/>
    
    <activity android:label="@string/app_name"
              android:name="com.playndora.plugins.overrideActivity"
              android:screenOrientation="portrait"
              android:configChanges=
                "locale|mcc|mnc|touchscreen|keyboard|keyboardHidden|navigation|orientation|screenLayout|uiMode|screenSize|smallestScreenSize|fontScale"             
              >
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />
            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>

    <activity android:label="@string/app_name"
              android:name="com.unity3d.player.UnityPlayerActivity"
              android:screenOrientation="portrait"
              android:configChanges=
                "locale|mcc|mnc|touchscreen|keyboard|keyboardHidden|navigation|orientation|screenLayout|uiMode|screenSize|smallestScreenSize|fontScale"
              />
    <activity android:label="@string/app_name"
              android:name="com.unity3d.player.UnityPlayerNativeActivity"
              android:screenOrientation="portrait"
              android:configChanges=
                "locale|mcc|mnc|touchscreen|keyboard|keyboardHidden|navigation|orientation|screenLayout|uiMode|screenSize|smallestScreenSize|fontScale"
              >
      
      <meta-data android:name="unityplayer.ForwardNativeEventsToDalvik" android:value="true" />
      <meta-data android:name="android.app.lib_name" android:value="unity" />
    </activity>

    <activity android:label="@string/app_name"
              android:name="com.unity3d.player.VideoPlayer"
              android:screenOrientation="behind"
              android:configChanges=
                "locale|mcc|mnc|touchscreen|keyboard|keyboardHidden|navigation|orientation|screenLayout|uiMode|screenSize|smallestScreenSize|fontScale"
              />

    <!-- Google Mobile Ads Activity -->
    <activity android:name="com.google.android.gms.ads.AdActivity"
              android:label="@string/app_name"
              android:configChanges="fontScale|keyboard|keyboardHidden|locale|mnc|mcc|navigation|orientation|screenLayout|screenSize|smallestScreenSize|uiMode|touchscreen">
    </activity>
  </application>

  <uses-permission android:name="com.android.vending.BILLING" />
  <uses-permission android:name="android.permission.INTERNET" />
  <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
 
</manifest>

You can see my article Add Ads Admob To Unity Game – Step By Step | tungnguyendev, good luck ^^