Java.lang.NoSuchMethodError: org.apache.tomcat.util.ExceptionUtils.unwrapInvocationTargetException

The code is not written by me, so I am not able to give proper input for question ;), but still want to know the cause of the exception in general. 🙂
I have installed OpenCRX CRM, and when I run, the following exception is thrown,

SEVERE: Begin event threw error
java.lang.NoSuchMethodError: org.apache.tomcat.util.ExceptionUtils.unwrapInvocationTargetException(Ljava/lang/Throwable;)Ljava/lang/Throwable;
at org.apache.catalina.core.AprLifecycleListener.init(AprLifecycleListener.java:184)
at org.apache.catalina.core.AprLifecycleListener.isAprAvailable(AprLifecycleListener.java:83)
at org.apache.catalina.connector.Connector.setProtocol(Connector.java:592)
at org.apache.catalina.connector.Connector.(Connector.java:66)
at org.apache.catalina.startup.ConnectorCreateRule.begin(ConnectorCreateRule.java:62)
at org.apache.tomcat.util.digester.Digester.startElement(Digester.java:1282)
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.startElement(AbstractSAXParser.java:507)
at com.sun.org.apache.xerces.internal.parsers.AbstractXMLDocumentParser.emptyElement(AbstractXMLDocumentParser.java:182)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanStartElement(XMLDocumentFragmentScannerImpl.java:1323)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:2750)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:625)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:489)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:828)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:757)
at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:133)
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1211)
at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(SAXParserImpl.java:551)
at org.apache.tomcat.util.digester.Digester.parse(Digester.java:1543)
at org.apache.catalina.startup.Catalina.load(Catalina.java:615)
at org.apache.catalina.startup.Catalina.load(Catalina.java:663)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:622)
at org.apache.catalina.startup.Bootstrap.load(Bootstrap.java:280)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:454)
java.lang.NoSuchMethodError: org.apache.tomcat.util.ExceptionUtils.unwrapInvocationTargetException(Ljava/lang/Throwable;)Ljava/lang/Throwable;
at org.apache.catalina.core.AprLifecycleListener.init(AprLifecycleListener.java:184)
at org.apache.catalina.core.AprLifecycleListener.isAprAvailable(AprLifecycleListener.java:83)
at org.apache.catalina.connector.Connector.setProtocol(Connector.java:592)
at org.apache.catalina.connector.Connector.(Connector.java:66)
at org.apache.catalina.startup.ConnectorCreateRule.begin(ConnectorCreateRule.java:62)
at org.apache.tomcat.util.digester.Digester.startElement(Digester.java:1282)
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.startElement(AbstractSAXParser.java:507)
at com.sun.org.apache.xerces.internal.parsers.AbstractXMLDocumentParser.emptyElement(AbstractXMLDocumentParser.java:182)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanStartElement(XMLDocumentFragmentScannerImpl.java:1323)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:2750)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:625)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:489)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:828)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:757)
at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:133)
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1211)
at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(SAXParserImpl.java:551)
at org.apache.tomcat.util.digester.Digester.parse(Digester.java:1543)
at org.apache.catalina.startup.Catalina.load(Catalina.java:615)
at org.apache.catalina.startup.Catalina.load(Catalina.java:663)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:622)
at org.apache.catalina.startup.Bootstrap.load(Bootstrap.java:280)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:454)

I would like to know when such a exception is thrown? What are the possible solutions should I try ?
Thank you 🙂