[SOLVED] Duplicated classes when building for Android

I'm getting lots of errors when I try to compile for Android.

CommandInvokationFailure: Gradle build failed.
/Applications/Unity/Hub/Editor/2019.3.7f1/PlaybackEngines/AndroidPlayer/OpenJDK/bin/java -classpath "/Applications/Unity/Hub/Editor/2019.3.7f1/PlaybackEngines/AndroidPlayer/Tools/gradle/lib/gradle-launcher-5.1.1.jar" org.gradle.launcher.GradleMain "-Dorg.gradle.jvmargs=-Xmx4096m" "assembleRelease"

stderr[

FAILURE: Build failed with an exception.

* What went wrong:
Execution...

[SOLVED] Duplicated classes when building for Android