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java.lang.NullPointerException: 	at org.apache.jasper.servlet.TldScanner$TldScannerCallback.scanWebInfClasses(TldScanner.java:401)	at org.apache.tomcat.util.scan.StandardJarScanner.scan(StandardJarScanner.java:208)	at org.apache.jasper.servlet.TldScanner.scanJars(TldScanner.java:262)	at org.apache.jasper.servlet.TldScanner.scan(TldScanner.java:106)	at org.apache.jasper.servlet.JasperInitializer.onStartup(JasperInitializer.java:103)	at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5261)	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:147)	at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:725)	at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:701)	at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:717)	at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:940)	at org.apache.catalina.startup.HostConfig$DeployWar.run(HostConfig.java:1816)	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)	at java.util.concurrent.FutureTask.run(FutureTask.java:266)	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)	at java.lang.Thread.run(Thread.java:745)