Personalization Block delivery issue
Hello guys, I am trying to use the personalization block mentioned below but I am facing an issue during deliverying . If I execute the preview I have no issue. Any idea?

var article = xtk.queryDef.create(<queryDef schema="xxx:ArticleCatalog" operation="select"> <select> <node expr={"@articleName"}/> <node expr={"@articleDesc"}/> <node expr={"@articlePageURL"}/> <node expr={"@articleURL"}/> </select> </queryDef>).ExecuteQuery() var articleName=article[0].@articleName