<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.eftimoff.mylibrary"
    >

  <application android:allowBackup="true">

  </application>

</manifest>

<manifest package="com.eftimoff.mylibrary">

    <application />
</manifest>

Delete the badly used allowBackup.
Delete the badly used allowBackup.
