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 If I run "gradlew sonarAnalyze", an exception is raised: 
Execution failed for task ':sonarAnalyze'. 
> PicoLifecycleException: method 'public void org.sonar.batch.bootstrap.BatchPluginRepository.start()', instance 'org.sonar.batch.bootstrap.BatchPluginRepository@40542fa7, java.lang.RuntimeException: wrapper 
Caused by: java.lang.ClassNotFoundException: org.sonar.api.Plugin 
at org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy.loadClass(SelfFirstStrategy.java:50) 
at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:244) 
at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:230) 
 
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