groovy.lang.MissingMethodException: No signature of method: java.lang.Boolean.toBoolean() is applicable for argument types: () values: []

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No signature of method: java.lang.Boolean.toBoolean() is applicable for argument types: () values: []
groovy.lang.MissingMethodException: No signature of method: java.lang.Boolean.toBoolean() is applicable for argument types: () values: []
at undefined._GrailsSettings_groovy.run(_GrailsSettings_groovy:74)
at undefined._GrailsSettings_groovy$run.call(Unknown Source)
at undefined._GrailsClasspath_groovy$run.call(Unknown Source)
at undefined._GrailsClasspath_groovy.run(_GrailsClasspath_groovy:32)
at undefined._GrailsClasspath_groovy$run.call(Unknown Source)
at undefined._GrailsEvents_groovy$run.call(Unknown Source)
at undefined._GrailsEvents_groovy.run(_GrailsEvents_groovy:30)
at undefined._GrailsEvents_groovy$run.call(Unknown Source)
at undefined._GrailsClean_groovy$run.call(Unknown Source)
at undefined._GrailsClean_groovy.run(_GrailsClean_groovy:29)
at undefined._GrailsClean_groovy$run.call(Unknown Source)
at undefined._GrailsPlugins_groovy$run.call(Unknown Source)
at undefined._GrailsPlugins_groovy.run(_GrailsPlugins_groovy:28)
at undefined._GrailsPlugins_groovy$run.call(Unknown Source)
at undefined._GrailsCreateProject_groovy$run.call(Unknown Source)
at undefined._GrailsCreateProject_groovy.run(_GrailsCreateProject_groovy:28)
at undefined._GrailsCreateProject_groovy$run.call(Unknown Source)
at undefined.CreateApp_.run(CreateApp_:25)
at undefined.CreateApp_$run.call(Unknown Source)
at gant.Gant.processTargets(Gant.groovy:494)
at gant.Gant.processTargets(Gant.groovy:480)

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