- What went wrong: Execution failed for task ':app:checkDebugDuplicateClasses'.
A failure occurred while executing com.android.build.gradle.internal.tasks.CheckDuplicatesRunnable Duplicate class com.google.android.exoplayer2.ui.DownloadNotificationHelper found in modules jetified-exoplayer-core-2.18.0-runtime (com.google.android.exoplayer:exoplayer-core:2.18.0) and jetified-exoplayer-ui-2.14.1-runtime (com.google.android.exoplayer:exoplayer-ui:2.14.1)
