I am getting build error

If your exception looks similar to this:

Project/Temp/StagingArea/AndroidManifest-main.xml:4:16-57 Error:

Attribute application@theme value=(@style/UnityThemeSelector) from AndroidManifest-main.xml:4:16-57
is also present at AndroidManifest.xml:11:4-51 value=(@android:style/Theme.NoTitleBar).

Suggestion: add 'tools:replace="android:theme"' to <application> element at AndroidManifest-main.xml:4:3-12:17 to override.

That is the common problem with Vungle Unity SDK 5.3.0.

This is also known issue with Unity Android build. You can solve it using steps below:

  1. Find and Open AndroidManifest by path: Plugins -> Android -> Vungle_lib
  2. Find line highlighted below:
  3. Replace it with new one. 

Note:

Incorrect line -> android:theme="@android:style/Theme.NoTitleBar">

Correct line -> android:theme="@style/UnityThemeSelector">