Android NullPointerException Crash - Unity 2021.3.43 / MAX 6.6.3 / Liftoff 7.4.0.0

[NickBogovich]

MAX Plugin Version

6.6.3

Unity Version

2021.3.43

Device/Platform Info

Android

Crashes/ANRs per Day

10

Percentage of Users Affected

4%

First Occurrence of Crash/ANR

Crash started happening once we updated MAX from 6.4.3 to 6.6.3 and Liftoff from 6.12.1.1 to 7.4.0.0 on Android.

Exception and Stack Trace

Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'java.util.List com.safedk.android.analytics.brandsafety.InterstitialFinder.a(java.lang.String, java.lang.String)' on a null object reference at com.safedk.android.analytics.brandsafety.creatives.CreativeInfoManager.a (SourceFile:262) at com.safedk.android.analytics.brandsafety.creatives.CreativeInfoManager.a (SourceFile:255) at com.safedk.android.analytics.brandsafety.BrandSafetyUtils.onShouldOverrideUrlLoading (SourceFile:2151) at com.vungle.ads.internal.ui.VungleWebClient.shouldOverrideUrlLoading at android.webkit.WebViewClient.shouldOverrideUrlLoading (WebViewClient.java:83) at org.chromium.android_webview.AwContentsClientBridge.shouldOverrideUrlLoading (chromium-TrichromeWebViewGoogle6432.aab-stable-666807033:124) at android.os.MessageQueue.nativePollOnce at android.os.MessageQueue.next (MessageQueue.java:342) at android.os.Looper.loopOnce (Looper.java:183) at android.os.Looper.loop (Looper.java:362) at android.app.ActivityThread.main (ActivityThread.java:8448) at java.lang.reflect.Method.invoke at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run (RuntimeInit.java:552) at com.android.internal.os.ZygoteInit.main (ZygoteInit.java:992)

How to Reproduce

Appears to happen when we load an interstitial from Vungle/Liftoff

Reproducible in the demo app?

Not Tested

Additional Info

No response

[alvarshahanji]

@NickBogovich it is coming from Vungle SDK and not the adapter. Could you report it to the Vungle team?

[NickBogovich]

I reported this issue to Vungle, and the Vungle team responded with this:

The provider of Liftoff Monetize - Vungle Android SDK v7 (com.vungle:vungle-ads) added this note on Sep 17: "Not caused by SDK: Thanks for reporting this crash. Based on the crash stack trace, the NullPointerException occurs on safedk. Please contact with safeDK about this crash."

I don't know who is in the right, but this sounds like an issue the two of you need to discern. All I know is that this issue is causing a significant amount of crashes in our app.

[alvarshahanji]

@NickBogovich sorry, I missed that. Which version of AdReview SDK have you integrated?

[NickBogovich]

How can I verify which version is integrated?

We are using AppLovin MAX and have the Enable MAX Ad Review checkbox enabled, so I'm guessing it would've pulled in whatever version of AdReview SDK was available on September 24 at 12:30p ET.

[alvarshahanji]

@NickBogovich could you share mediation debugger with us?

[NickBogovich]

Mediation Debugger says:

MAX SDK Version: 12.6.1 Plugin Version: Max-Unity-6.6.3 Ad Review Version: 5.4.6

[alvarshahanji]

Thank you.

Are you able to reproduce this issue on your end?

Could you share the app details and steps to repro if you are able to repro the issue with Vungle ads?

[NickBogovich]

I was able to reproduce it in the Mediation Debugger by playing a Vungle Rewarded ad unit. It took about 8-10 ads before it happened, but it did eventually happen with a similar crash and stack:

Caused by java.lang.NullPointerException
Attempt to invoke virtual method 'java.util.List com.safedk.android.analytics.brandsafety.InterstitialFinder.a(java.lang.String, java.lang.String)' on a null object reference

com.safedk.android.analytics.brandsafety.creatives.CreativeInfoManager.a (SourceFile:262)
com.safedk.android.analytics.brandsafety.creatives.CreativeInfoManager.a (SourceFile:255)
com.safedk.android.analytics.brandsafety.BrandSafetyUtils.onShouldOverrideUrlLoading (SourceFile:2151)
com.vungle.ads.internal.ui.VungleWebClient.shouldOverrideUrlLoading (Unknown Source:13)
android.webkit.WebViewClient.shouldOverrideUrlLoading (WebViewClient.java:83)
org.chromium.android_webview.AwContentsClientBridge.shouldOverrideUrlLoading (chromium-TrichromeWebViewGoogle6432.aab-stable-666807033:124)
android.os.MessageQueue.nativePollOnce (MessageQueue.java)

[NickBogovich]

The odd thing seems to be that there is a call to an InterstitialFinder method when I was attempting to display a RewardedVideo -- not sure if that has anything to do with it.

[NickBogovich]

Also, based on when this crash appeared in our logs, the issue may have been introduced between Ad Review 5.4.0 and 5.4.5.

[alvarshahanji]

@NickBogovich good to know you were able to repro. Thanks for the additional info.

1. As requested before, could you share the app details and steps to repro?
2. Could you try reproducing the issue using demo app as well?
3. Could you check if the crash is still reproducible with the latest Ad Review 5.5.0?

[NickBogovich]

Re: app in question and repro steps -- the app in question is Play To Win Casino on Android (net.playtowingames.casino), and the steps to reproduce are to display a rewarded video when requested, and sometimes when a Liftoff Monetize RV ad is displayed, the app seems to crash upon closing the ad. This is also the case when a Liftoff RV ad was showed via the Mediation Debugger --- on occasion, closing the ad would result in the crash.

I will try later today to reproduce the crash with the latest Ad Review 5.5.0.

[alvarshahanji]

@NickBogovich I could not repro the crash on my device using your app. I watched multiple LiftOff ads using mediation debugger.

1. Is the issue device specific? Have you tried on multiple devices?
2. Were you able to reproduce on our demo app?
3. Let us know id the crash is resolved with Ad Review 5.5.0

[NickBogovich]

The frequency of this issue dropped significantly around November 1st/2nd. Considering we've made no changes to our waterfall and there was no change in version during this time, I have to guess this issue is/was related to bad creative configuration or something else that is ad or backend related.