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java.lang.NullPointerException: 	at java.net.URLEncoder.encode(URLEncoder.java:188)	at oracle.security.am.engines.enginecontroller.PasswordPolicyEngineController.handlePasswordPolicyAction(PasswordPolicyEngineController.java:720)	at oracle.security.am.engines.enginecontroller.PasswordPolicyEngineController.handleEvent(PasswordPolicyEngineController.java:402)	at oracle.security.am.engines.enginecontroller.PasswordPolicyEngineController.handlePasswordPolicyEvent(PasswordPolicyEngineController.java:293)	at oracle.security.am.engines.enginecontroller.PasswordPolicyEngineController.processEvent(PasswordPolicyEngineController.java:164)	at oracle.security.am.controller.MasterController.processEvent(MasterController.java:568)	at oracle.security.am.controller.MasterController.processRequest(MasterController.java:757)	at oracle.security.am.controller.MasterController.process(MasterController.java:680)	at oracle.security.am.pbl.PBLFlowManager.delegateToMasterController(PBLFlowManager.java:209)	at oracle.security.am.pbl.PBLFlowManager.handleBaseEvent(PBLFlowManager.java:147)	at oracle.security.am.pbl.PBLFlowManager.processRequest(PBLFlowManager.java:107)	at oracle.security.am.pbl.transport.http.AMServlet.handleRequest(AMServlet.java:171)	at oracle.security.am.pbl.transport.http.AMServlet.doPost(AMServlet.java:136)	at oracle.security.am.pbl.transport.http.AMServlet.doGet(AMServlet.java:691)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:707)	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)	at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:300)	at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:26)	at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)	at oracle.security.wls.filter.SSOSessionSynchronizationFilter.doFilter(SSOSessionSynchronizationFilter.java:276)	at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)	at oracle.security.jps.ee.http.JpsAbsFilter$1.run(JpsAbsFilter.java:111)	at oracle.security.jps.util.JpsSubject.doAsPrivileged(JpsSubject.java:313)	at oracle.security.jps.ee.util.JpsPlatformUtil.runJaasMode(JpsPlatformUtil.java:413)	at oracle.security.jps.ee.http.JpsAbsFilter.runJaasMode(JpsAbsFilter.java:94)	at oracle.security.jps.ee.http.JpsAbsFilter.doFilter(JpsAbsFilter.java:161)	at oracle.security.jps.ee.http.JpsFilter.doFilter(JpsFilter.java:71)	at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)	at oracle.dms.servlet.DMSServletFilter.doFilter(DMSServletFilter.java:136)	at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)	at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.wrapRun(WebAppServletContext.java:3715)	at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:3681)	at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)	at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:120)	at weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletContext.java:2277)	at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:2183)	at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1454)	at weblogic.work.ExecuteThread.execute(ExecuteThread.java:209)	at weblogic.work.ExecuteThread.run(ExecuteThread.java:178)