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java.lang.NullPointerException: Name is null	at java.lang.Enum.valueOf(Enum.java:236)	at crazydev.iccube.gwt.base.shared.model.file.GwtFileType.valueOf(SourceFile:15)	at crazydev.iccube.gwt.server.service.IcCubeFileDownloadServlet.doHandle(SourceFile:119)	at crazydev.iccube.gwt.server.servlet.IcCubeHttpServlet.doGet(SourceFile:28)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:687)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)	at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:808)	at crazydev.iccube.server.http.IcCubeServletHolder.handle(SourceFile:63)	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1669)	at org.eclipse.jetty.servlets.UserAgentFilter.doFilter(UserAgentFilter.java:83)	at org.eclipse.jetty.servlets.GzipFilter.doFilter(GzipFilter.java:364)	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652)	at crazydev.iccube.server.authentication.IcCubeGwtAuthenticationServletFilter.doFilter(SourceFile:101)	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652)	at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:585)	at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:221)	at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1127)	at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:515)	at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185)	at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1061)	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)	at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:110)	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97)	at org.eclipse.jetty.server.Server.handle(Server.java:497)	at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:310)	at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:257)	at org.eclipse.jetty.io.AbstractConnection$2.run(AbstractConnection.java:540)	at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:635)	at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:555)	at java.lang.Thread.run(Thread.java:745)