Maven Petals Plugin

[INFO] --- maven-plugin-plugin:3.6.0:helpmojo (help-goal) @ petals-maven-plugin ---
[INFO] Using 'UTF-8' encoding to read mojo source files.
[INFO] java-javadoc mojo extractor found 0 mojo descriptor.
[ERROR] Failed to analyze /home/xxxx/.m2/repository/org/ow2/easycommons/easycommons-lang/1.7.0-SNAPSHOT/easycommons-lang-1.7.0-SNAPSHOT.jar!/com/ebmwebsourcing/easycommons/lang/CollectionHelper.class
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...
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[INFO] BUILD FAILURE
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[INFO] Total time:  3.384 s
[INFO] Finished at: 2023-04-27T10:03:35+02:00
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[ERROR] Failed to execute goal org.apache.maven.plugins:maven-plugin-plugin:3.6.0:helpmojo (help-goal) on project petals-maven-plugin: Execution help-goal of goal org.apache.maven.plugins:maven-plugin-plugin:3.6.0:helpmojo failed: Unsupported class file major version 61 -> [Help 1]