Si è verificato un errore nell'elaborarazione del modello.
The following has evaluated to null or missing:
==> firstMenuItem  [in template "230874#237820#CONTENUTO-DUE-LIVELLI-AVVISI-NORMATIVI" at line 17, column 12]

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Tip: If the failing expression is known to legally refer to something that's sometimes null or missing, either specify a default value like myOptionalVar!myDefault, or use <#if myOptionalVar??>when-present<#else>when-missing</#if>. (These only cover the last step of the expression; to cover the whole expression, use parenthesis: (myOptionalVar.foo)!myDefault, (myOptionalVar.foo)??
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FTL stack trace ("~" means nesting-related):
	- Failed at: #if firstMenuItem.getSiblings()?has_c...  [in template "230874#237820#CONTENUTO-DUE-LIVELLI-AVVISI-NORMATIVI" at line 17, column 7]
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1<#assign  
2  activeClass="" 
3/> 
4<span class="anchor" id="${.vars['reserved-article-id'].data}"></span> 
5<article class="page-detail page-detail--has-background"> 
6  <div class="container"> 
7    <div class="row js-section"> 
8 
9      <div class="col-12"> 
10        <div class="page-detail__intro"> 
11          <h1 class="page-detail__title"> 
12            ${.vars['reserved-article-title'].data} 
13          </h1> 
14        </div> 
15      </div> 
16 
17      <#if firstMenuItem.getSiblings()?has_content> 
18        <div class="col-md-3 col-lg-2"> 
19          <div class="tab-menu tab-menu--mobile-compact has-anchor mb-3 mb-md-0"> 
20            <button class="tab-menu__btn d-md-none">${firstMenuItem.getSiblings()[0].getData()}</button> 
21            <ul class="tab-menu__list"> 
22              <#list firstMenuItem.getSiblings() as cur_firstMenuItem>  
23                <#assign activeClass = "" /> 
24                <#assign target = "_self" /> 
25                <#assign dataLevel = "data-level='first-level'"> 
26                <#if cur_firstMenuItem?index == 0> 
27                  <#assign activeClass = "active" /> 
28                </#if> 
29                <#assign curItemLink = cur_firstMenuItem.dataAnchor.getData() /> 
30                <#assign hrefCurItemLink = "#" + curItemLink /> 
31                <#if cur_firstMenuItem.link.getData()?? && cur_firstMenuItem.link.getData()?has_content> 
32                  <#assign hrefCurItemLink = cur_firstMenuItem.link.getData() /> 
33                  <#assign dataLevel = "" /> 
34                  <#assign target = "_blank" /> 
35                </#if> 
36                <#if cur_firstMenuItem.firstItemFileTitle.firstItemReportFile?? && cur_firstMenuItem.firstItemFileTitle.firstItemReportFile.getData()?has_content> 
37                  <#assign hrefCurItemLink = cur_firstMenuItem.firstItemFileTitle.firstItemReportFile.getData() /> 
38                  <#assign dataLevel = "" /> 
39                  <#assign target = "_blank" /> 
40                </#if> 
41                <li class="tab-menu__item"> 
42                  <a href="${hrefCurItemLink}" ${dataLevel} target="${target}" title="${cur_firstMenuItem.getData()}" data-id="${curItemLink}" data-content="${cur_firstMenuItem.getData()}"  class="tab-menu__link ${activeClass}"> 
43                    ${cur_firstMenuItem.getData()} 
44                  </a> 
45                </li> 
46              </#list> 
47            </ul> 
48          </div> 
49        </div> 
50        <#list firstMenuItem.getSiblings() as cur_firstMenuItem>  
51          <#assign dNone = "style='display: none'" /> 
52            <#if cur_firstMenuItem?index == 0> 
53              <#assign dNone = "" /> 
54            </#if> 
55          <#assign curItemTextLink = cur_firstMenuItem.dataAnchor.getData() /> 
56          <#if firstMenuItem.firstMenuItemContent?? && firstMenuItem.firstMenuItemContent.getData()?has_content> 
57          <div class="tab-menu-section col-md-9 offset-lg-1" ${dNone} data-level="first-level" id="${curItemTextLink}"> 
58            ${cur_firstMenuItem.firstMenuItemContent.getData()} 
59          </div> 
60          </#if> 
61        </#list> 
62      </#if> 
63    </div> 
64  </div> 
65</article>