Jasper problem running reports using groovy (zkwebui)

When you try to run a jasper report that uses groovy the following exception is raised:
>>java.lang.NoClassDefFoundError: org/codehaus/groovy/control/CompilationFailedException
>>java.lang.ClassNotFoundException: org.codehaus.groovy.control.CompilationFailedException
>> at org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal(BundleLoader.java:506)
>> at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:422)
>> at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:410)
>> at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.loadClass(DefaultClassLoader.java:107)
>> at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
>> at java.lang.Class.getDeclaredConstructors0(Native Method)
>> at java.lang.Class.privateGetDeclaredConstructors(Class.java:2389)
>> at java.lang.Class.getConstructor0(Class.java:2699)
>> at java.lang.Class.newInstance0(Class.java:326)
>> at java.lang.Class.newInstance(Class.java:308)
>> at net.sf.jasperreports.engine.JasperCompileManager.getCompiler(JasperCompileManager.java:472)
>> at net.sf.jasperreports.engine.JasperCompileManager.loadEvaluator(JasperCompileManager.java:238)