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This exception has no message.
java.lang.NullPointerException: 	at oracle.xdo.servlet.resources.action.ListFolderPermissions.execute(ListFolderPermissions.java:90)	at oracle.xdo.servlet.resources.action.ActionServlet.service(ActionServlet.java:45)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)	at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:227)	at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:125)