FlowExecutionException when trying to access webpage on Spring Boot application

Question

I'm trying to run my application locally. When I attempt to access http://localhost:8090/myproduct/e-renew.htm I get this:

[2022-03-29 16:42:34,963] [-245290382@qtp--1728403730-2] [] [0000St8MA0mbh8TScZ0fC34YqOx:-1] [ERROR] [i.h.d.w.l.LoggingListener] [ Method : Webflow e-renew-flow threw exception in state renewalLogonDetails request: /product/e-renew.htm?_flowExecutionKey=e2s1&_flowId=e-renew-flow Context : Exception thrown in state 'renewalLogonDetails' of flow 'e-renew-flow' : org.springframework.webflow.execution.FlowExecutionException: Exception thrown in state 'renewalLogonDetails' of flow 'e-renew-flow' at org.springframework.webflow.engine.impl.FlowExecutionImpl.wrap(FlowExecutionImpl.java:568) at org.springframework.webflow.engine.impl.FlowExecutionImpl.resume(FlowExecutionImpl.java:267) at org.springframework.webflow.executor.FlowExecutorImpl.resumeExecution(FlowExecutorImpl.java:153) at org.springframework.webflow.mvc.servlet.FlowHandlerAdapter.handle(FlowHandlerAdapter.java:173) at org.springframework.webflow.mvc.servlet.FlowController.handleRequest(FlowController.java:172) at org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:48) at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:875) at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:809) at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:571) at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:501) at javax.servlet.http.HttpServlet.service(HttpServlet.java:707) at javax.servlet.http.HttpServlet.service(HttpServlet.java:820) at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1221) at ie.example.d.web.mdcInternetFilter.AuthenticationFilter.doFilter(AuthenticationFilter.java:68) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1212) at net.sf.ehcache.constructs.web.filter.GzipFilter.doFilter(GzipFilter.java:95) at net.sf.ehcache.constructs.web.filter.Filter.doFilter(Filter.java:86) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1212) at ch.qos.logback.classic.selector.servlet.LoggerContextFilter.doFilter(LoggerContextFilter.java:69) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1212) at org.togglz.servlet.TogglzFilter.doFilter(TogglzFilter.java:100) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1212) at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:399) at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216) at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182) at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:766) at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:450) at org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:230) at org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114) at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152) at org.mortbay.jetty.Server.handle(Server.java:326) at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542) at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:928) at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:549) at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212) at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404) at org.mortbay.jetty.bio.SocketConnector$Connection.run(SocketConnector.java:228) at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582) Caused by: java.lang.IllegalStateException: Exception occurred rendering view org.springframework.web.servlet.view.JstlView: name 'ma/e-renew/renewalLogonDetailsResponsive'; URL [/WEB-INF/jsp/ma/e-renew/renewalLogonDetailsResponsive.jsp] at org.springframework.webflow.mvc.view.AbstractMvcView.render(AbstractMvcView.java:173) at org.springframework.webflow.engine.ViewState.render(ViewState.java:257) at org.springframework.webflow.engine.ViewState.resume(ViewState.java:216) at org.springframework.webflow.engine.Flow.resume(Flow.java:551) at org.springframework.webflow.engine.impl.FlowExecutionImpl.resume(FlowExecutionImpl.java:263) ... 37 more Caused by: org.apache.jasper.JasperException: /WEB-INF/jsp/ma/e-renew/renewalLogonDetailsResponsive.jsp(1,72) PWC6188: The absolute uri: http://www.example.com/tags/simpletags cannot be resolved in either web.xml or the jar files deployed with this application at org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:89) at org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:375) at org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:169) at org.apache.jasper.compiler.TagLibraryInfoImpl.generateTLDLocation(TagLibraryInfoImpl.java:433) at org.apache.jasper.compiler.TagLibraryInfoImpl.(TagLibraryInfoImpl.java:238) at org.apache.jasper.compiler.Parser.parseTaglibDirective(Parser.java:498) at org.apache.jasper.compiler.Parser.parseDirective(Parser.java:578) at org.apache.jasper.compiler.Parser.parseElements(Parser.java:1642) at org.apache.jasper.compiler.Parser.parse(Parser.java:181) at org.apache.jasper.compiler.ParserController.doParse(ParserController.java:239) at org.apache.jasper.compiler.ParserController.parse(ParserController.java:140) at org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:199) at org.apache.jasper.compiler.Compiler.compile(Compiler.java:435) at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:608) at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:360) at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:486) at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:380) at javax.servlet.http.HttpServlet.service(HttpServlet.java:820) at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511) at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:401) at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216) at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182) at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:766) at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:450) at org.mortbay.jetty.servlet.Dispatcher.forward(Dispatcher.java:327) at org.mortbay.jetty.servlet.Dispatcher.forward(Dispatcher.java:126) at org.springframework.web.servlet.view.InternalResourceView.renderMergedOutputModel(InternalResourceView.java:240) at org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:258) at org.springframework.webflow.mvc.servlet.ServletMvcView.doRender(ServletMvcView.java:50) at org.springframework.webflow.mvc.view.AbstractMvcView.render(AbstractMvcView.java:169) ... 41 more

Seems to be something to do with http://www.example.com/tags/simpletags. I notice this appears at the top of my jsp pages in the form of <%@ taglib prefix="tags" uri="http://www.example.com/tags/simpletags"%> but I've no idea what it's for. What could be causing this?