UnityAds Unsupported class file major version 61

Archived Forums Monetization & Growth LevelPlay Mediation
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1

I can’t complete the External Dependency Manager → Resolve after i add the UnityAds Adapter trough the Level Play Integration Manager, i get an error during the resolve that says: “Unsupported class file major version 61”.

Without the UnityAds Adapter it works fine, i can Resolve the External Dependencies, build, play and run the LevelPlay demo scene.

I’m using all the default Unity Hub versions of the JDK and SDK.
Unity version 2022.3.11f1

2

Hi EDevJogos,

Oh, lol! I detected the same issue and spent 3 hours trying to understand what I was doing wrong. This is my first game and my initial attempt at integrating ads into it. So, I discovered that looks like it works normal on the preview version of is manager - v7.5.1.
Hope it will work for you too.

Thanks,
Andrei.

3

We are aware of this issue: LP SDK v7.5.2 & Unity Adapter v4.3.39, kindly confirm if it’s the case, If yes, please try to use Unity Adapter to v4.3.38 instead for now., it should work.
PS: We are working on a permanent solution.
Let’s know if any problems.

4

@yunanhou

Can you guys please tell me how in the world to fix this. I do not know how to downgrade this software since there is no option provided in the LevelPlayer Integration Manager. IronSource is also broken on 7.6.0 so I was able to download v7.5.2 and that seems to work.

I am on Unity version 2022.3.14f1 which has java version 11.

Here is a copy of my ISUnityAdsAdapterDependencies.xml.

<dependencies>
<unityversion>4.3.39.0</unityversion>
<androidPackages>
<androidPackage spec="com.ironsource.adapters:unityadsadapter:4.3.34">
<repositories>
<repository>https://android-sdk.is.com/</repository>
</repositories>
</androidPackage>
</androidPackages>
<androidPackages>
<androidPackage spec="com.unity3d.ads:unity-ads:4.9.2">
<repositories>
<repository>https://maven.google.com/</repository>
</repositories>
</androidPackage>
</androidPackages>

<iosPods>
<iosPod name="IronSourceUnityAdsAdapter" version="4.3.34.0">
<sources>
<source>https://github.com/CocoaPods/Specs</source>
</sources>
</iosPod>
</iosPods>
</dependencies>

Here is output from the dependency resolver which only happens after I install Unity Ads:

* What went wrong:
Execution failed for task ':process_androidx.activity.activity-1.9.0-alpha01.aar'.
> Unsupported class file major version 61

I don’t even know how to uninstall unity ads, let alone downgrade it.

5

I downgraded ironsource to v7.4.0 and that seemed to finally fix it.

Yall unity devs really need to fix this, this is a giant mess.

6

How do we downgrade Unity Adapter to v4.3.38, there is no way to manage the versions in Unity.

7

Did you manage to fix something? It’s quite urgent as a fix.
We cannot updated IronSource and mediations cause of this problem.

Furthermore ‘Force Resolve’ stopped working after Febrarury 1. I don’t know if it’s anything changed in the backend, but on Febrarury 1 I could resolve the dependencies. Now, it gives me error without touching anything in the project.
This is preventing me from update any plugins which require a dependencies resolution step.

8

I got it working. Steps I did below.

  • Delete IronSource folder
  • Fix your Android Resolution Issues (I had to delete the .jar and.aar files in Assets/Plugins/Android)
  • Reinstall IronSource/Unity Ads, I didn’t update IronSource, using version 7.2.5.2.