Unity Build Error Duplicate class,Unity Build Error duplicate class

Questions & Answers
1

Hello Everybody
OneDrive delete my project and I download project from OneDrive again but I’ve encountered a lot of errors like that

Duplicate class com.google.android.gms.auth.api.credentials.zzk found in the following modules: classes.jar (:com.google.android.gms.play-services-auth-16.0.1 1:), classes.jar (:com.google.android.gms.play-services-auth-16.0.1 2:), classes.jar (:com.google.android.gms.play-services-auth-16.0.1 3:) and classes.jar (:com.google.android.gms.play-services-auth-16.0.1:)
Duplicate class com.google.android.gms.auth.api.accounttransfer.zzf found in the following modules: classes.jar (:com.google.android.gms.play-services-auth-base-16.0.0 1:), classes.jar (:com.google.android.gms.play-services-auth-base-16.0.0 2:), classes.jar (:com.google.android.gms.play-services-auth-base-16.0.0 3:) and classes.jar (:com.google.android.gms.play-services-auth-base-16.0.0:)

Duplicate class com.google.android.gms.ads.rewarded.zzb found in modules classes.jar (:com.google.android.gms.play-services-ads-lite-18.1.1 1:) and classes.jar (:com.google.android.gms.play-services-ads-lite-18.1.1:)

Duplicate class com.google.android.gms.ads.mediation.MediationNativeAdCallback found in modules classes.jar (:com.google.android.gms.play-services-ads-lite-18.1.1 1:) and classes.jar (:com.google.android.gms.play-services-ads-lite-18.1.1:)

It gives me 6708 error :((

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,I can not build my app .
I get errors like that
Duplicate class com.google.android.gms.ads.internal.zzf found in modules classes.jar (:com.google.android.gms.play-services-ads-18.1.1 1:) and classes.jar (:com.google.android.gms.play-services-ads-18.1.1:)
Duplicate class com.google.android.gms.ads.internal.ClientApi found in modules classes.jar (:com.google.android.gms.play-services-ads-18.1.1 1:) and classes.jar (:com.google.android.gms.play-services-ads-18.1.1:)
Duplicate class com.google.android.gms.ads.search.SearchAdRequest found in modules classes.jar (:com.google.android.gms.play-services-ads-lite-18.1.1 1:) and classes.jar (:com.google.android.gms.play-services-ads-lite-18.1.1:)
Duplicate class com.google.android.gms.auth.api.credentials.zzk found in the following modules: classes.jar (:com.google.android.gms.play-services-auth-16.0.1 1:), classes.jar (:com.google.android.gms.play-services-auth-16.0.1 2:), classes.jar (:com.google.android.gms.play-services-auth-16.0.1 3:) and classes.jar (:com.google.android.gms.play-services-auth-16.0.1:)
ı get 6708 error

One Drive delete my project and ı download it from OneDrive again but I’ve encountered a lot of errors.

146066-uniti.png
146066-uniti.png1607×655 140 KB

2

Change your gradle plugin version in the your build.gradle file. You might need to keep playing around with the version number till you get it right. At least that’s how it worked for me.

3

You might be imported more than one library in the android plugins folder. Keep one then it will resolve the issue