Error creating extended parser class: null at 71:/skins/flamingo/view.vm[line 21, column 36]

org.apache.velocity.exception.MethodInvocationException: Invocation of method 'getRenderedContent' in  class com.xpn.xwiki.api.Document threw exception java.lang.RuntimeException: Error creating extended parser class: null at 35:/skins/flamingo/view.vm[line 21, column 36]
    at org.apache.velocity.runtime.parser.node.ASTMethod.handleInvocationException(ASTMethod.java:243)
    at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:187)
    at org.apache.velocity.runtime.parser.node.ASTReference.execute(ASTReference.java:280)
    at org.apache.velocity.runtime.parser.node.ASTReference.value(ASTReference.java:567)
    at org.apache.velocity.runtime.parser.node.ASTExpression.value(ASTExpression.java:71)
    at org.apache.velocity.runtime.parser.node.ASTSetDirective.render(ASTSetDirective.java:142)
    at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72)
    at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:342)
    at org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:106)
    at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72)
    at org.xwiki.velocity.introspection.TryCatchDirective.render(TryCatchDirective.java:87)
    at org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:207)
    at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:342)
    at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluateInternal(DefaultVelocityEngine.java:259)
    at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluate(DefaultVelocityEngine.java:222)
    at com.xpn.xwiki.render.DefaultVelocityManager.evaluate(DefaultVelocityManager.java:357)
    at com.xpn.xwiki.internal.template.InternalTemplateManager.evaluateContent(InternalTemplateManager.java:825)
    at com.xpn.xwiki.internal.template.InternalTemplateManager.render(InternalTemplateManager.java:701)
    at com.xpn.xwiki.internal.template.InternalTemplateManager.lambda$renderFromSkin$0(InternalTemplateManager.java:676)
    at com.xpn.xwiki.internal.security.authorization.DefaultAuthorExecutor.call(DefaultAuthorExecutor.java:85)
    at com.xpn.xwiki.internal.template.InternalTemplateManager.renderFromSkin(InternalTemplateManager.java:675)
    at com.xpn.xwiki.internal.template.InternalTemplateManager.renderFromSkin(InternalTemplateManager.java:654)
    at com.xpn.xwiki.internal.template.InternalTemplateManager.render(InternalTemplateManager.java:640)
    at com.xpn.xwiki.internal.template.DefaultTemplateManager.render(DefaultTemplateManager.java:78)
    at com.xpn.xwiki.XWiki.evaluateTemplate(XWiki.java:2256)
    at com.xpn.xwiki.XWiki.parseTemplate(XWiki.java:2234)
    at com.xpn.xwiki.api.XWiki.parseTemplate(XWiki.java:992)
    at sun.reflect.GeneratedMethodAccessor286.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.doInvoke(UberspectImpl.java:395)
    at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.invoke(UberspectImpl.java:384)
    at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:173)
    at org.apache.velocity.runtime.parser.node.ASTReference.execute(ASTReference.java:280)
    at org.apache.velocity.runtime.parser.node.ASTReference.render(ASTReference.java:369)
    at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72)
    at org.apache.velocity.runtime.directive.VelocimacroProxy.render(VelocimacroProxy.java:216)
    at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:311)
    at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:230)
    at org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:207)
    at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:342)
    at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluateInternal(DefaultVelocityEngine.java:259)
    at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluate(DefaultVelocityEngine.java:222)
    at com.xpn.xwiki.render.DefaultVelocityManager.evaluate(DefaultVelocityManager.java:357)
    at com.xpn.xwiki.internal.template.InternalTemplateManager.evaluateContent(InternalTemplateManager.java:825)
    at com.xpn.xwiki.internal.template.InternalTemplateManager.render(InternalTemplateManager.java:701)
    at com.xpn.xwiki.internal.template.InternalTemplateManager.lambda$renderFromSkin$0(InternalTemplateManager.java:676)
    at com.xpn.xwiki.internal.security.authorization.DefaultAuthorExecutor.call(DefaultAuthorExecutor.java:85)
    at com.xpn.xwiki.internal.template.InternalTemplateManager.renderFromSkin(InternalTemplateManager.java:675)
    at com.xpn.xwiki.internal.template.InternalTemplateManager.renderFromSkin(InternalTemplateManager.java:654)
    at com.xpn.xwiki.internal.template.InternalTemplateManager.render(InternalTemplateManager.java:640)
    at com.xpn.xwiki.internal.template.DefaultTemplateManager.render(DefaultTemplateManager.java:78)
    at com.xpn.xwiki.XWiki.evaluateTemplate(XWiki.java:2256)
    at com.xpn.xwiki.XWiki.parseTemplate(XWiki.java:2234)
    at com.xpn.xwiki.api.XWiki.parseTemplate(XWiki.java:992)
    at sun.reflect.GeneratedMethodAccessor286.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.doInvoke(UberspectImpl.java:395)
    at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.invoke(UberspectImpl.java:384)
    at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:173)
    at org.apache.velocity.runtime.parser.node.ASTReference.execute(ASTReference.java:280)
    at org.apache.velocity.runtime.parser.node.ASTReference.render(ASTReference.java:369)
    at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72)
    at org.apache.velocity.runtime.directive.VelocimacroProxy.render(VelocimacroProxy.java:216)
    at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:311)
    at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:230)
    at org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:207)
    at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72)
    at org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:87)
    at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72)
    at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:342)
    at org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:106)
    at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:342)
    at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluateInternal(DefaultVelocityEngine.java:259)
    at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluate(DefaultVelocityEngine.java:222)
    at com.xpn.xwiki.render.DefaultVelocityManager.evaluate(DefaultVelocityManager.java:357)
    at com.xpn.xwiki.internal.template.InternalTemplateManager.evaluateContent(InternalTemplateManager.java:825)
    at com.xpn.xwiki.internal.template.InternalTemplateManager.render(InternalTemplateManager.java:701)
    at com.xpn.xwiki.internal.template.InternalTemplateManager.lambda$renderFromSkin$0(InternalTemplateManager.java:676)
    at com.xpn.xwiki.internal.security.authorization.DefaultAuthorExecutor.call(DefaultAuthorExecutor.java:85)
    at com.xpn.xwiki.internal.template.InternalTemplateManager.renderFromSkin(InternalTemplateManager.java:675)
    at com.xpn.xwiki.internal.template.InternalTemplateManager.renderFromSkin(InternalTemplateManager.java:654)
    at com.xpn.xwiki.internal.template.InternalTemplateManager.render(InternalTemplateManager.java:640)
    at com.xpn.xwiki.internal.template.DefaultTemplateManager.render(DefaultTemplateManager.java:78)
    at com.xpn.xwiki.XWiki.evaluateTemplate(XWiki.java:2256)
    at com.xpn.xwiki.web.Utils.parseTemplate(Utils.java:180)
    at com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:475)
    at com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:209)
    at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:425)
    at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:228)
    at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913)
    at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:449)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:622)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:292)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
    at com.xpn.xwiki.web.ActionFilter.doFilter(ActionFilter.java:112)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
    at org.xwiki.wysiwyg.filter.ConversionFilter.doFilter(ConversionFilter.java:127)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
    at org.xwiki.container.servlet.filters.internal.SetHTTPHeaderFilter.doFilter(SetHTTPHeaderFilter.java:63)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
    at org.xwiki.container.servlet.filters.internal.SavedRequestRestorerFilter.doFilter(SavedRequestRestorerFilter.java:208)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
    at org.xwiki.container.servlet.filters.internal.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:111)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
    at org.xwiki.resource.servlet.RoutingFilter.doFilter(RoutingFilter.java:134)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:494)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
    at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:522)
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1095)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:672)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1520)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1476)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.RuntimeException: Error creating extended parser class: null
    at org.parboiled.Parboiled.createParser(Parboiled.java:58)
    at org.pegdown.PegDownProcessor.<init>(PegDownProcessor.java:92)
    at org.pegdown.PegDownProcessor.<init>(PegDownProcessor.java:61)
    at org.xwiki.contrib.rendering.markdown10.internal.parser.MarkdownStreamParser.parse(MarkdownStreamParser.java:68)
    at org.xwiki.contrib.rendering.markdown10.internal.parser.MarkdownParser.parse(MarkdownParser.java:64)
    at org.xwiki.rendering.internal.parser.DefaultContentParser.parse(DefaultContentParser.java:62)
    at org.xwiki.rendering.internal.parser.DefaultContentParser.parse(DefaultContentParser.java:69)
    at com.xpn.xwiki.doc.XWikiDocument.parseContent(XWikiDocument.java:8512)
    at com.xpn.xwiki.doc.XWikiDocument.parseContent(XWikiDocument.java:8501)
    at com.xpn.xwiki.doc.XWikiDocument.getXDOM(XWikiDocument.java:8343)
    at org.xwiki.display.internal.DocumentContentDisplayer.getContent(DocumentContentDisplayer.java:280)
    at org.xwiki.display.internal.DocumentContentDisplayer.display(DocumentContentDisplayer.java:248)
    at org.xwiki.display.internal.DocumentContentDisplayer.display(DocumentContentDisplayer.java:133)
    at org.xwiki.display.internal.DocumentContentDisplayer.display(DocumentContentDisplayer.java:58)
    at org.xwiki.display.internal.DefaultDocumentDisplayer.display(DefaultDocumentDisplayer.java:96)
    at org.xwiki.display.internal.DefaultDocumentDisplayer.display(DefaultDocumentDisplayer.java:39)
    at org.xwiki.sheet.internal.SheetDocumentDisplayer.display(SheetDocumentDisplayer.java:123)
    at org.xwiki.sheet.internal.SheetDocumentDisplayer.display(SheetDocumentDisplayer.java:52)
    at org.xwiki.display.internal.ConfiguredDocumentDisplayer.display(ConfiguredDocumentDisplayer.java:68)
    at org.xwiki.display.internal.ConfiguredDocumentDisplayer.display(ConfiguredDocumentDisplayer.java:42)
    at com.xpn.xwiki.doc.XWikiDocument.display(XWikiDocument.java:1179)
    at com.xpn.xwiki.doc.XWikiDocument.getRenderedContent(XWikiDocument.java:1220)
    at com.xpn.xwiki.doc.XWikiDocument.getRenderedContent(XWikiDocument.java:1197)
    at com.xpn.xwiki.doc.XWikiDocument.getRenderedContent(XWikiDocument.java:1228)
    at com.xpn.xwiki.api.Document.getRenderedContent(Document.java:730)
    at sun.reflect.GeneratedMethodAccessor724.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.doInvoke(UberspectImpl.java:395)
    at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.invoke(UberspectImpl.java:384)
    at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:173)
    ... 132 more
Caused by: java.lang.IllegalStateException
    at org.objectweb.asm.tree.analysis.BasicInterpreter.<init>(BasicInterpreter.java:67)
    at org.parboiled.transform.RuleMethodInterpreter.<init>(RuleMethodInterpreter.java:42)
    at org.parboiled.transform.InstructionGraphCreator.process(InstructionGraphCreator.java:41)
    at org.parboiled.transform.ParserTransformer.runMethodTransformers(ParserTransformer.java:62)
    at org.parboiled.transform.ParserTransformer.extendParserClass(ParserTransformer.java:45)
    at org.parboiled.transform.ParserTransformer.transformParser(ParserTransformer.java:38)
    at org.parboiled.Parboiled.createParser(Parboiled.java:54)
    ... 162 more