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    Look if your classpath is correct, and check if the versions of your libraries match the version you described in your pom.xml

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java.lang.NoClassDefFoundError: javax/servlet/jsp/el/VariableResolver	at java.lang.ClassLoader.defineClass1(Native Method)	at java.lang.ClassLoader.defineClass(ClassLoader.java:620)	at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124)	at java.net.URLClassLoader.defineClass(URLClassLoader.java:260)	at java.net.URLClassLoader.access$100(URLClassLoader.java:56)	at java.net.URLClassLoader$1.run(URLClassLoader.java:195)	at java.security.AccessController.doPrivileged(Native Method)	at java.net.URLClassLoader.findClass(URLClassLoader.java:188)	at java.lang.ClassLoader.loadClass(ClassLoader.java:306)	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:268)	at java.lang.ClassLoader.loadClass(ClassLoader.java:251)	at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)	at org.apache.jasper.compiler.JspRuntimeContext.(JspRuntimeContext.java:74)	at org.apache.jasper.JspC.initServletContext(JspC.java:1086)	at org.apache.jasper.JspC.execute(JspC.java:951)	at org.netbeans.modules.web.project.ant.JspC.main(JspC.java:39)	at org.netbeans.modules.web.project.ant.JspCSingle.main(JspCSingle.java:94)