Screen Render Error

org.ofbiz.base.util.GeneralException: Problems processing action: java.lang.NullPointerException: Cannot invoke "org.ofbiz.entity.GenericValue.getString(String)" because "userLogin" is null (Cannot invoke "org.ofbiz.entity.GenericValue.getString(String)" because "userLogin" is null)
	at org.ofbiz.widget.screen.ModelScreenAction$Javaf.runAction(ModelScreenAction.java:485)
	at org.ofbiz.widget.screen.ModelScreenAction.runSubActions(ModelScreenAction.java:122)
	at org.ofbiz.widget.screen.ModelScreenWidget$Section.renderWidgetString(ModelScreenWidget.java:225)
	at org.ofbiz.widget.screen.ModelScreen.renderScreenString(ModelScreen.java:420)
	at org.ofbiz.widget.screen.ScreenRenderer.render(ScreenRenderer.java:155)
	at org.ofbiz.widget.screen.ScreenRenderer.render(ScreenRenderer.java:91)
	at org.ofbiz.widget.screen.ScreenWidgetViewHandler.render(ScreenWidgetViewHandler.java:100)
	at org.ofbiz.webapp.control.RequestHandler.renderView(RequestHandler.java:828)
	at org.ofbiz.webapp.control.RequestHandler.doRequest(RequestHandler.java:565)
	at org.ofbiz.webapp.control.ControlServlet.doGet(ControlServlet.java:216)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:622)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.ofbiz.webapp.control.ContextFilter.doFilter(ContextFilter.java:260)
	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:201)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:544)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:143)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78)
	at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:698)
	at org.ofbiz.catalina.container.CrossSubdomainSessionValve.invoke(CrossSubdomainSessionValve.java:64)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:364)
	at org.apache.coyote.ajp.AjpProcessor.service(AjpProcessor.java:526)
	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)
	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:831)
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1629)
	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1130)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	at java.base/java.lang.Thread.run(Thread.java:832)
Caused by: java.lang.NullPointerException: Cannot invoke "org.ofbiz.entity.GenericValue.getString(String)" because "userLogin" is null
	at com.graciousstyle.loyalty.LoyaltyActions.getRewardsPoints(LoyaltyActions.java:124)
	at com.graciousstyle.loyalty.LoyaltyActions.getRewardsPoints(LoyaltyActions.java:344)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:64)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:564)
	at org.ofbiz.widget.screen.ModelScreenAction$Javaf.runAction(ModelScreenAction.java:479)
	... 37 more