The following has evaluated to null or missing: ==> data.category.id [in template "cekasp/cekasp_article_list.ftl.htm" at line 85, column 38] Tip: If the failing expression is known to be legally null/missing, either specify a default value with myOptionalVar!myDefault, or use <#if myOptionalVar??>when-present<#else>when-missing. (These only cover the last step of the expression; to cover the whole expression, use parenthessis: (myOptionVar.foo)!myDefault, (myOptionVar.foo)?? The failing instruction (print stack trace for 3 more): ==> #elseif (data.category?? && data.cate... [in template "cekasp/cekasp_article_list.ftl.htm" at line 85, column 9]