How can I fix “unsupported class file major version 60” in IntelliJ IDEA?

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TL;DR; You need to have the Java version which is compatible with your Gradle version, and configure Gradle to use exactly that version (not older Java, and not even newer version).

I fixed this problem by changing the Gradle JVM settings in IntelliJ settings:

  • In the Settings/Preferences dialog, go to Build, Execution, Deployment → Build Tools → Gradle.

  • Under the Gradle section, change the Gradle JVM option. Select a Gradle JVM which works for you.

    Enter image description here

See Resolve the Gradle JVM version for the existing project

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