Spring AOP errors

Aspect-Oriented Programming (AOP) complements Object-Oriented Programming (OOP) by providing another way of thinking about program structure

https://github.com/spring-projects/spring-framework
Solution coverage:
Summary coverage:

DescriptionException TypeEntry MethodWeb pages

AspectJProxyFactory.addAspect() has thrown a NullPointerException

java.lang.NullPointerException
31 frames hidden
org.springframework.aop.aspectj.annotation.AspectJProxyFactory.addAspect
2Web pages
NullPointerExceptionAspectJProxyFactory.addAspect2
Package nameClass namePatterns foundSolution coverageSummary coverage
org.springframework.aop.aspectj.annotationAspectJProxyFactory2
org.springframework.aop.aspectj.annotationReflectiveAspectJAdvisorFactory1
Package nameClass nameMethod namePatterns foundSolution coverage
org.springframework.aop.aspectj.annotationAspectJProxyFactoryaddAspect2
org.springframework.aop.aspectj.annotationReflectiveAspectJAdvisorFactory<clinit>1
Package nameClass nameMethod nameException TypePatterns foundSolution coverage
org.springframework.aop.aspectj.annotationAspectJProxyFactoryaddAspectIllegalArgumentException1
org.springframework.aop.aspectj.annotationAspectJProxyFactoryaddAspectNullPointerException1
org.springframework.aop.aspectj.annotationReflectiveAspectJAdvisorFactory<clinit>NoClassDefFoundError1