what is the resolution for the bellow error?

pe Exception report

message

description The server encountered an internal error () that prevented it from fulfilling this request.

exception

org.apache.jasper.JasperException: Failed to load or instantiate TagExtraInfo class: org.apache.struts.taglib.html.MessagesTei org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:51) org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:409) org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:281) org.apache.jasper.compiler.TagLibraryInfoImpl.createTagInfo(TagLibraryInfoImpl.java:423) org.apache.jasper.compiler.TagLibraryInfoImpl.parseTLD(TagLibraryInfoImpl.java:249) org.apache.jasper.compiler.TagLibraryInfoImpl.(TagLibraryInfoImpl.java:163) org.apache.jasper.compiler.Parser.parseTaglibDirective(Parser.java:424) org.apache.jasper.compiler.Parser.parseDirective(Parser.java:493) org.apache.jasper.compiler.Parser.parseElements(Parser.java:1557) org.apache.jasper.compiler.Parser.parse(Parser.java:127) org.apache.jasper.compiler.ParserController.doParse(ParserController.java:212) org.apache.jasper.compiler.ParserController.parse(ParserController.java:101) org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:156) org.apache.jasper.compiler.Compiler.compile(Compiler.java:296) org.apache.jasper.compiler.Compiler.compile(Compiler.java:277) org.apache.jasper.compiler.Compiler.compile(Compiler.java:265) org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:564) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:302) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:329) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265) javax.servlet.http.HttpServlet.service(HttpServlet.java:803)

root cause

java.lang.ClassNotFoundException: org.apache.struts.taglib.html.MessagesTei org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1363) org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1209) org.apache.jasper.compiler.TagLibraryInfoImpl.createTagInfo(TagLibraryInfoImpl.java:420) org.apache.jasper.compiler.TagLibraryInfoImpl.parseTLD(TagLibraryInfoImpl.java:249) org.apache.jasper.compiler.TagLibraryInfoImpl.(TagLibraryInfoImpl.java:163) org.apache.jasper.compiler.Parser.parseTaglibDirective(Parser.java:424) org.apache.jasper.compiler.Parser.parseDirective(Parser.java:493) org.apache.jasper.compiler.Parser.parseElements(Parser.java:1557) org.apache.jasper.compiler.Parser.parse(Parser.java:127) org.apache.jasper.compiler.ParserController.doParse(ParserController.java:212) org.apache.jasper.compiler.ParserController.parse(ParserController.java:101) org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:156) org.apache.jasper.compiler.Compiler.compile(Compiler.java:296) org.apache.jasper.compiler.Compiler.compile(Compiler.java:277) org.apache.jasper.compiler.Compiler.compile(Compiler.java:265) org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:564) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:302) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:329) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265) javax.servlet.http.HttpServlet.service(HttpServlet.java:803)

note The full stack trace of the root cause is available in the Apache Tomcat/5.5.26 logs.