Horrible Exception: org.apache.velocity.exception.MethodInvocationException: Invocation of method 'isLoggedInUser' in class de.maxence.project.services.project.ProjectTool threw exception class java.lang.NullPointerException : null at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:246) at org.apache.velocity.runtime.parser.node.ASTReference.execute(ASTReference.java:175) at org.apache.velocity.runtime.parser.node.ASTReference.evaluate(ASTReference.java:307) at org.apache.velocity.runtime.parser.node.ASTNotNode.evaluate(ASTNotNode.java:45) at org.apache.velocity.runtime.parser.node.ASTExpression.evaluate(ASTExpression.java:45) at org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:68) at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:55) at org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:70) at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:55) at org.apache.velocity.runtime.directive.Foreach.render(Foreach.java:155) at org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:114) at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:230) at org.apache.velocity.runtime.directive.VelocimacroProxy.render(VelocimacroProxy.java:172) at org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:114) at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:55) at org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:70) at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:230) at org.apache.velocity.runtime.directive.Parse.render(Parse.java:181) at org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:114) at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:55) at org.apache.velocity.runtime.parser.node.ASTElseIfStatement.render(ASTElseIfStatement.java:78) at org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:89) at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:230) at org.apache.velocity.Template.merge(Template.java:256) at org.apache.velocity.app.Velocity.mergeTemplate(Velocity.java:449) at org.apache.velocity.app.Velocity.mergeTemplate(Velocity.java:418) rethrown as org.apache.turbine.util.TurbineException: Error rendering Velocity template: layouts/lanxess.vm: Invocation of method 'isLoggedInUser' in class de.maxence.project.services.project.ProjectTool threw exception class java.lang.NullPointerException : null at org.apache.turbine.services.velocity.TurbineVelocityService.renderingError(TurbineVelocityService.java:533) at org.apache.turbine.services.velocity.TurbineVelocityService.decodeRequest(TurbineVelocityService.java:389) rethrown as org.apache.turbine.util.TurbineException: Error rendering Velocity template: layouts/lanxess.vm: Error rendering Velocity template: layouts/lanxess.vm: Invocation of method 'isLoggedInUser' in class de.maxence.project.services.project.ProjectTool threw exception class java.lang.NullPointerException : null at org.apache.turbine.services.velocity.TurbineVelocityService.renderingError(TurbineVelocityService.java:533) at org.apache.turbine.services.velocity.TurbineVelocityService.handleRequest(TurbineVelocityService.java:283) at org.apache.turbine.services.velocity.TurbineVelocity.handleRequest(TurbineVelocity.java:107) at org.apache.turbine.modules.layouts.VelocityECSLayout.doBuild(VelocityECSLayout.java:128) at org.apache.turbine.modules.Layout.build(Layout.java:91) at org.apache.turbine.modules.LayoutLoader.exec(LayoutLoader.java:123) at org.apache.turbine.modules.pages.DefaultPage.doBuild(DefaultPage.java:169) at org.apache.turbine.modules.Page.build(Page.java:90) at org.apache.turbine.modules.PageLoader.exec(PageLoader.java:123) at org.apache.turbine.Turbine.doGet(Turbine.java:563) at javax.servlet.http.HttpServlet.service(HttpServlet.java:634) at javax.servlet.http.HttpServlet.service(HttpServlet.java:741) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at de.maxence.project.utils.UTF8Filter.doFilter(UTF8Filter.java:67) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:541) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:690) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) at org.apache.coyote.ajp.AjpProcessor.service(AjpProcessor.java:431) at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:868) at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1590) at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) 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:750)