Cannot cast object extension jruby

[matshou]

Gradle version: 6.8.2
Plugin version: jruby-gradle.base:2.0.1

* What went wrong:
Could not determine the dependencies of task ':generateChangelog'.
> Cannot cast object 'extension 'jruby'' with class 'com.github.jrubygradle.JRubyPluginExtension_Decorated' to class 'org.ysb33r.grolifant.api.AbstractCombinedProjectTaskExtension'

Caused by: org.codehaus.groovy.runtime.typehandling.GroovyCastException: Cannot cast object 'extension 'jruby'' with class 'com.github.jrubygradle.JRubyPluginExtension_Decorated' to class 'org.ysb33r.grolifant.api.AbstractCombinedProjectTaskExtension'
	at org.ysb33r.grolifant.api.AbstractCombinedProjectTaskExtension.getProjectExtension(AbstractCombinedProjectTaskExtension.groovy:101)
	at com.github.jrubygradle.JRubyPluginExtension_Decorated.getProjectExtension(Unknown Source)
	at com.github.jrubygradle.JRubyPluginExtension.getExtFromProject(JRubyPluginExtension.groovy:305)
	at com.github.jrubygradle.JRubyPluginExtension.getGemPrepareTaskName(JRubyPluginExtension.groovy:282)
	at com.github.jrubygradle.JRubyPluginExtension_Decorated.getGemPrepareTaskName(Unknown Source)
	at com.github.jrubygradle.JRubyExec$_closure3.doCall(JRubyExec.groovy:83)

[ysb33r]

Looks like you have a mix up of a newer version of Grolifant being introduced by another plugin. DO you have an example of your build script?

[matshou]

Unfortunately I've moved on to different solutions and no longer have access to code that caused this.