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java.lang.NullPointerException: null	at java.beans.Introspector.getPublicDeclaredMethods(Introspector.java:1337)	at java.beans.Introspector.getTargetMethodInfo(Introspector.java:1197)	at java.beans.Introspector.getBeanInfo(Introspector.java:426)	at java.beans.Introspector.getBeanInfo(Introspector.java:173)	at java.beans.Introspector.getBeanInfo(Introspector.java:260)	at java.beans.Introspector.(Introspector.java:407)	at java.beans.Introspector.getBeanInfo(Introspector.java:173)	at groovy.lang.MetaClassImpl$15.run(MetaClassImpl.java:3290)	at java.security.AccessController.doPrivileged(Native Method)	at groovy.lang.MetaClassImpl.addProperties(MetaClassImpl.java:3288)	at groovy.lang.MetaClassImpl.initialize(MetaClassImpl.java:3265)	at org.codehaus.groovy.reflection.ClassInfo.getMetaClassUnderLock(ClassInfo.java:254)	at org.codehaus.groovy.reflection.ClassInfo.getMetaClass(ClassInfo.java:285)	at org.codehaus.groovy.runtime.callsite.ClassMetaClassGetPropertySite.(ClassMetaClassGetPropertySite.java:38)	at org.codehaus.groovy.runtime.callsite.AbstractCallSite.createClassMetaClassGetPropertySite(AbstractCallSite.java:373)	at org.codehaus.groovy.runtime.callsite.AbstractCallSite.createGetPropertySite(AbstractCallSite.java:325)	at org.codehaus.groovy.runtime.callsite.AbstractCallSite.acceptGetProperty(AbstractCallSite.java:312)	at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callGetProperty(AbstractCallSite.java:296)	at org.grails.plugins.databasemigration.DatabaseMigrationGrailsPlugin.configureLiquibase(DatabaseMigrationGrailsPlugin.groovy:96)	at org.grails.plugins.databasemigration.DatabaseMigrationGrailsPlugin.doWithSpring(DatabaseMigrationGrailsPlugin.groovy:55)	at org.grails.plugins.DefaultGrailsPlugin.doWithRuntimeConfiguration(DefaultGrailsPlugin.java:555)	at org.grails.plugins.AbstractGrailsPluginManager.doRuntimeConfiguration(AbstractGrailsPluginManager.java:167)	at grails.boot.config.GrailsApplicationPostProcessor.postProcessBeanDefinitionRegistry(GrailsApplicationPostProcessor.groovy:171)	at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:118)	at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:686)	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:524)	at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:122)	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:761)	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:371)	at org.springframework.boot.SpringApplication.run(SpringApplication.java:315)