NoClassDefFoundError

[itzno...@gmail.com]

This issue has popped up in the last few hours out of nowhere, going up to a few thousand crashes.

Data as per Crashlytics:

AdMob SDK version: 21.0.0

Mediation: AppLovin

Crash Velocity: High

Device affected: Samsung 99%

Android version: Android 11

Reproducible: No

Stacktrace:

Fatal Exception: java.lang.NoClassDefFoundError: Failed resolution of: Lcfvg;
       at com.google.android.gms.ads.internal.config.n.d(n.java)
       at com.google.android.gms.ads.AdManagerCreatorImpl.newAdManagerByType(AdManagerCreatorImpl.java:2)
       at com.google.android.gms.ads.internal.client.ap.el(ap.java:5)
       at equ.onTransact(equ.java:12)
       at android.os.Binder.transact(Binder.java:1079)
       at com.google.android.gms.internal.ads.zzaqv.zzbk(com.google.android.gms:play-services-ads-base@@21.0.0:2)
       at com.google.android.gms.ads.internal.client.zzbt.zze(com.google.android.gms:play-services-ads-lite@@21.0.0:8)
       at com.google.android.gms.ads.internal.client.zzk.zza(com.google.android.gms:play-services-ads-lite@@21.0.0:15)
       at com.google.android.gms.ads.internal.client.zzai.zzc(com.google.android.gms:play-services-ads-lite@@21.0.0:1)
       at com.google.android.gms.ads.internal.client.zzav.zzf(com.google.android.gms:play-services-ads-lite@@21.0.0:1)
       at com.google.android.gms.ads.internal.client.zzav.zzd(com.google.android.gms:play-services-ads-lite@@21.0.0:11)
       at com.google.android.gms.ads.internal.client.zzau.zzd(com.google.android.gms:play-services-ads-lite@@21.0.0:2)
       at com.google.android.gms.internal.ads.zzbcn.zza(com.google.android.gms:play-services-ads-lite@@21.0.0:3)
       at com.google.android.gms.ads.appopen.zzb.run(com.google.android.gms:play-services-ads-lite@@21.0.0:2)
       at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
       at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
       at java.lang.Thread.run(Thread.java:923)

[Mobile Ads SDK Forum Advisor]

Hi,

Thank you for reaching out to us.

Let me share this to the rest of the team to further investigate. We will update you once we have more information.

Regards,

Princess Pamela Mobile Ads SDK Team

ref:_00D1U1174p._5004Q2cEor7:ref

[Mobile Ads SDK Forum Advisor]

Hi,

Thank you for patiently waiting.

The team mentioned that the ClassNotFoundException error happens when an application tries to load in a class through its string name but no definition for the class with the specified name could be found.

Can you provide the following? You can provide it directly to the link below.

• Provide a complete stack trace for all threads
• Inspect their code and see if any incorrect implementations might cause the error
• Verify if this happens when loading/displaying ads

If the file(s) you are looking to share are less than 25mb in total you can attach them to this case on your next reply. If you are having trouble attaching your file to this case or if your file(s) are larger than 25mb, you can share your files with me by performing the following steps:

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