[Question] Resolver fails (java.lang.NoClassDefFoundError)

[mehmeteacar]

[REQUIRED] Please fill in the following fields:

• Unity editor version: 6000.0.34f1
• External Dependency Manager version: 1.2.185
• Source you installed EDM4U: .unitypackage
• Features in External Dependency Manager in use: Android Resolver, iOS Resolver
• Plugins SDK in use: Firebase 12.6.0, Admob 9.6.0, GPG 2.0.0
• Platform you are using the Unity editor on: Windows 11

[REQUIRED] Please describe the question here:

I have installed these plugins (Admob and Firebase) but Android Resolver fails, with an error saying java.lang.NoClassDefFoundError: Could not initialize class org.codehaus.groovy.vmplugin.v7.Java7

Goes on like this

I'm using openjdk and gradle installed with unity. What might be the cause?

[google-oss-bot]

This issue does not seem to follow the issue template. Make sure you provide all the required information.

[argzdev]

Hey @mehmeteacar, thanks for reaching out. It could be a caching error. Could you try the provided solution here and see if it changes anything?

1. Unity > Edit > Preferences > External Tools
2. Click and click again on each JDK, Android SDK, Android NDK, and Gradle checkbox.

The act of toggling each checkbox resets something within Unity's settings somewhere.

Afterwards, Gradle should function properly.

In case it doesn't, could you please provide an MCVE for us to check this further? Thanks!

[mehmeteacar]

@argzdev hi, I managed to solve it by editing settingsTemplate.gradle file as mentioned here. Enabled custom gradle settings as well.

[argzdev]

That's great to hear you were able to resolve the issue. Thanks for sharing the solution!