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java.lang.NullPointerException: 	at com.sun.el.parser.AstValue.setValue(AstValue.java:247)	at com.sun.el.ValueExpressionImpl.setValue(ValueExpressionImpl.java:294)	at org.jboss.weld.el.WeldValueExpression.setValue(WeldValueExpression.java:64)	at com.sun.faces.facelets.el.TagValueExpression.setValue(TagValueExpression.java:131)	at javax.faces.validator.ValueExpressionAnalyzer.getReference(ValueExpressionAnalyzer.java:68)	at javax.faces.validator.BeanValidator.validate(BeanValidator.java:307)	at javax.faces.component.UIInput.validateValue(UIInput.java:1164)	at javax.faces.component.UIInput.validate(UIInput.java:982)	at javax.faces.component.UIInput.executeValidate(UIInput.java:1248)	at javax.faces.component.UIInput.processValidators(UIInput.java:712)	at javax.faces.component.UIComponentBase.processValidators(UIComponentBase.java:1261)	at org.primefaces.component.api.UIData.process(UIData.java:334)	at org.primefaces.component.api.UIData.processChildren(UIData.java:318)	at org.primefaces.component.api.UIData.processPhase(UIData.java:280)	at org.primefaces.component.api.UIData.processValidators(UIData.java:254)	at javax.faces.component.UIComponentBase.processValidators(UIComponentBase.java:1261)	at org.primefaces.component.panel.Panel.processValidators(Panel.java:281)	at javax.faces.component.UIComponentBase.processValidators(UIComponentBase.java:1261)	at org.primefaces.component.panel.Panel.processValidators(Panel.java:281)	at javax.faces.component.UIForm.processValidators(UIForm.java:253)	at javax.faces.component.UIComponentBase.processValidators(UIComponentBase.java:1261)	at org.primefaces.component.panel.Panel.processValidators(Panel.java:281)	at javax.faces.component.UIComponentBase.processValidators(UIComponentBase.java:1261)	at org.primefaces.component.panel.Panel.processValidators(Panel.java:281)	at javax.faces.component.UIComponentBase.processValidators(UIComponentBase.java:1261)	at javax.faces.component.UIComponentBase.processValidators(UIComponentBase.java:1261)	at javax.faces.component.UIViewRoot.processValidators(UIViewRoot.java:1195)	at com.sun.faces.lifecycle.ProcessValidationsPhase.execute(ProcessValidationsPhase.java:76)