How to resolve "Could not find method bundle() for arguments [build_6plat21h.....] on object of type com.android.build.gradle.LibraryExtension"?

Alright I submit, I am trying to get a Unity 3D project working in a View on Android and it seems easy enough thanks to some tutorials online. However, I am stuck at the part where I need to convert the unity project to a module/AAR file. When following steps on these online tutorials, I get to the stage where I need to sync the gradle project and I receive:

ERROR: Could not find method bundle() for arguments [build_6plat2lh5rmq66u2k9bfvj0j1$_run_closure3$_closure12@655df9f] on object of type com.android.build.gradle.LibraryExtension.

The steps I used to produce the issue:

On Unity:

• I have set up a basic 3D animation

• Go to build settings

  • set texture compression: ETC2 > build system: Gradle > check: Export project
  • Set package name

• Click Export

• Select a folder for the library

Android Studio

• File -> New -> Import Module -> Select project that was exported from Unity
• Project opens -> "Gradle settings are not configured for this project yet, would you like to use the Gradle Wrapper" -> Select "Ok"
• In build.gradle
  • Remove applicationID (as instructed by android docs)
  • Change apply plugin: 'com.android.application' to apply plugin: 'com.android.library'
• Sync gradle project

Where I found these steps:

• https://medium.com/@davidbeloosesky/embedded-unity-within-android-app-7061f4f473a and a couple of similar medium tutorials
• https://developer.android.com/studio/projects/android-library

Version Info

• Gradle version: 4.10.1
• Android plugin version: 3.3.0
• Gradle wrapper properties distributionURL:
  https://services.gradle.org/distributions/gradle-4.10.1-all.zip

[EDIT] I forgot to mention that I removed [below] from the manifest

<intent-filter>
    <action android:name="android.intent.action.MAIN" />
    <category android:name="android.intent.category.LAUNCHER" />
    <category android:name="android.intent.category.LEANBACK_LAUNCHER" />
</intent-filter>

I ran into the same problem trying all things, commenting the bundle block fixed the problem for me

/*bundle {
        language {
            enableSplit = false
        }
        density {
            enableSplit = false
        }
        abi {
            enableSplit = true
        }
    }*/

I am not sure if this is the right approach but after building the project and generating the apk I got my .aar file which I guess is what you are trying to get.