Once I try to run any report link from reports section I am getting below error. Please suggest.

Message :

Dear user, Unable to generate the report, So please contact servicedesk support for further assistance to resolve the issue and forward this mail and support file(s) to  support@servicedeskplus.com

Error Trace :

net.sf.jasperreports.engine.JRException: Errors were encountered when compiling report expressions class file: 1. Invalid escape sequence (valid ones are \b \t \n \f \r \" \' \\ ) value = "Generated by Irfan Ahmad\IT\Outfitters\LHR " + "on : " + com.adventnet.servicedesk.reports.utils.TimeFormat.getStandardDateFormat(new java.util.Date().getTime(),"MMM d, yyyy hh:mm a") ; //$JR_EXPR_ID=10$ <-------------------------------------------> 2. Invalid escape sequence (valid ones are \b \t \n \f \r \" \' \\ ) value = "Generated by Irfan Ahmad\IT\Outfitters\LHR " + "on : " + com.adventnet.servicedesk.reports.utils.TimeFormat.getStandardDateFormat(new java.util.Date().getTime(),"MMM d, yyyy hh:mm a") ; //$JR_EXPR_ID=10$ <-------------------------------------------> 3. Invalid escape sequence (valid ones are \b \t \n \f \r \" \' \\ ) value = "Generated by Irfan Ahmad\IT\Outfitters\LHR " + "on : " + com.adventnet.servicedesk.reports.utils.TimeFormat.getStandardDateFormat(new java.util.Date().getTime(),"MMM d, yyyy hh:mm a") ; //$JR_EXPR_ID=10$ <-------------------------------------------> 3 errors at net.sf.jasperreports.engine.design.JRAbstractCompiler.compileReport(JRAbstractCompiler.java:204) at net.sf.jasperreports.engine.JasperCompileManager.compile(JasperCompileManager.java:241) at net.sf.jasperreports.engine.JasperCompileManager.compileToFile(JasperCompileManager.java:157) at net.sf.jasperreports.engine.JasperCompileManager.compileReportToFile(JasperCompileManager.java:450) at com.adventnet.servicedesk.reports.utils.CoreReportDesigner.generateMatrixReport(CoreReportDesigner.java:3887) at com.adventnet.servicedesk.reports.utils.CoreReportDesigner.generateMatrixReport(CoreReportDesigner.java:3760) at com.adventnet.servicedesk.reports.utils.CoreReportDesigner.generateMatrixReportCompiledJasper(CoreReportDesigner.java:4190) at com.adventnet.servicedesk.reports.action.ReportRequestHandler.generateReport(ReportRequestHandler.java:1027) at com.adventnet.servicedesk.reports.action.ReportRequestHandler.handleRequest(ReportRequestHandler.java:1933) at com.adventnet.servicedesk.reports.action.CustomReportHandler.handleRequest(CustomReportHandler.java:196) at com.adventnet.servicedesk.reports.action.ReportHandler.execute(ReportHandler.java:60) at org.apache.struts.chain.commands.servlet.ExecuteAction.execute(ExecuteAction.java:58) at org.apache.struts.chain.commands.AbstractExecuteAction.execute(AbstractExecuteAction.java:67) at org.apache.struts.chain.commands.ActionCommandBase.execute(ActionCommandBase.java:51) at org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:191) at org.apache.commons.chain.generic.LookupCommand.execute(LookupCommand.java:305) at org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:191) at org.apache.struts.chain.ComposableRequestProcessor.process(ComposableRequestProcessor.java:283) at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913) at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:462) at javax.servlet.http.HttpServlet.service(HttpServlet.java:641) at javax.servlet.http.HttpServlet.service(HttpServlet.java:722) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:75) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) at com.manageengine.servicedesk.common.filter.ResetThreadLocal.doFilter(ResetThreadLocal.java:26) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) at com.adventnet.servicedesk.filter.EncodingFilter.doFilter(EncodingFilter.java:209) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) at org.tuckey.web.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:350) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) at com.adventnet.servicedesk.filter.RememberMe.doFilter(RememberMe.java:98) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) at com.adventnet.servicedesk.authentication.NTLMV2CredentialAssociationFilter.doFilter(NTLMV2CredentialAssociationFilter.java:34) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) at com.adventnet.servicedesk.authentication.NTLMV2Filter.doFilter(NTLMV2Filter.java:197) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:224) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:169) at org.jboss.web.tomcat.security.CustomPrincipalValve.invoke(CustomPrincipalValve.java:70) at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:159) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:581) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98) at com.adventnet.authentication.CredentialAssociation.invoke(CredentialAssociation.java:78) at com.adventnet.servicedesk.tools.AuthenticateNtlm.invoke(AuthenticateNtlm.java:175) at org.apache.catalina.authenticator.SingleSignOn.invoke(SingleSignOn.java:336) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407) at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:987) at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:579) at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:309) at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at java.lang.Thread.run(Unknown Source)