Se ha producido un error al procesar la plantilla. 
The following has evaluated to null or missing:
==> imagen.imatgeMiniFieldSet.imatgeMini.urlExterna  [in template "10132#10165#GALERIA_IMATGES_DIBA" at line 8, column 34]

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Tip: It's the step after the last dot that caused this error, not those before it.
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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: #assign imagenMiniURL = imagen.imatge...  [in template "10132#10165#GALERIA_IMATGES_DIBA" at line 8, column 10]
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1<h2>${titol.getData()}</h2>  
2<#assign urlImatge=""> 
3<div class="row" id="galeria_${.vars["reserved-article-id"].data}">  
4    <#assign i=0>  
5    <#list imatgeFieldSet.getSiblings() as imagen>   
6      <#assign imagenMiniURL= imagen.imatgeMiniFieldSet.imatgeMini.getData()>   
7      <#if !imagenMiniURL?has_content || imagenMiniURL?length ==0>   
8         <#assign imagenMiniURL= imagen.imatgeMiniFieldSet.imatgeMini.urlExterna.getData()>   
9      </#if>    
10      <#assign imagenGranURL= imagen.imatgeGranFieldSet.imatgeGran.getData()>   
11      <#if !imagenGranURL?has_content || imagenGranURL?length ==0>   
12         <#assign imagenGranURL= imagen.imatgeGranFieldSet.imatgeGran.urlExterna2.getData()>   
13      </#if>    
14      <div class="col-md-auto mb-4">  
15			 <a class="fancybox" data-fancybox-group="${.vars["reserved-article-id"].data}" data-fancybox-type="image" title="${imagen.descripcio.getData()}" href="${imagenGranURL}">   
16         <img src="${imagenMiniURL}" class="img-fluid m-0 mb-3 zoom no-lazy" style="width:${ampladaMinis.getData()}px" title="${imagen.descripcio.getData()}" alt="${imagen.descripcio.getData()}" />   
17       </a>   
18       <div id="${getterUtil.getLong(i)}"_${.vars["reserved-article-id"].data}" class="d-none"> </div>  
19     </div>  
20     <#assign i= i+1>  
21    </#list>  
22</div>  
23  
24<script>  
25if(!jQuery('body').hasClass('fancyBoxLoaded')){  
26    jQuery('body').addClass('fancyBoxLoaded');  
27    document.write("<script type='text/javascript' src='https://media.diba.cat/intradiba/js/jquery.fancybox.pack.js?v=2.1.5'><\/script>");  
28    document.write("<link rel='stylesheet' type='text/css' href='https://media.diba.cat/intradiba/css/jquery.fancybox.css?v=2.1.5'>");  
29}  
30  
31jQuery(document).ready(function(){  
32   jQuery(".fancybox").fancybox({  
33       helpers : {  
34            title: {  
35                type: 'inside'  
36            }  
37        }, 
38    });        
39});  
40  
41</script>