Fehler bei der Verarbeitung der Vorlage.
The following has evaluated to null or missing:
==> Visualizador.Slide  [in template "37703#37743#1558583" at line 17, column 19]

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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 images = Visualizador.Slide.g...  [in template "37703#37743#1558583" at line 17, column 1]
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1<#-- Reserved vbles --> 
2<#assign title = .vars['reserved-article-title'].data> 
3<#assign articleId=.vars["reserved-article-id"].data /> 
4<#assign description=.vars["reserved-article-description"].data /> 
5<#assign smallImageUrl=.vars["reserved-article-small-image-url"].data /> 
6<#assign date=.vars["reserved-article-display-date"].data /> 
7<#assign request = .vars['request']> 
8 
9<#-- Init --> 
10<#assign assetEntry = journalTool.getAssetEntryByArticleId(groupId, articleId) !/> 
11<#assign journalArticle = journalTool.getJournalArticleByAssetEntry(assetEntry) !/> 
12<#assign ddmStructureNameNormalize = "template-${friendlyURLNormalizerTool.normalize(journalArticle.getDDMStructure().getName(localeUtil.getDefault()))}" /> 
13 
14<#assign thumbnailBannerUuid = themeDisplay.getLayoutSet().getSettingsProperty("banner")!""/> 
15<#assign imagePath = ""/> 
16<#assign imagePathBanner = ""/> 
17<#assign images = Visualizador.Slide.getSiblings() !/> 
18<#assign googlePlay = Informacion.GooglePlay.data !/> 
19<#assign appStore = Informacion.AppStore.data !/> 
20 
21<section class="template ${ddmStructureNameNormalize}"> 
22	<div class="row gx-5" temscope itemtype="http://schema.org/SoftwareApplication"> 
23		<div class="col-lg-4 col-md-6 col-sm-6 col-12"> 
24			<div class="card"> 
25				<#if smallImageUrl?has_content> 
26					<#assign cssClass = "d-block image-wrapper aspect-ratio-bg-cover aspect-ratio-4-to-3"/>							 
27					<span class="${cssClass}" style="background-image: url('${dlTool.getThumbnail(smallImageUrl, '3', imagePathBanner)}');"> 
28						<img class="hide-accessible" alt="Imagen ${Nombre.data}" src="${dlTool.getThumbnail(smallImageUrl, '3', imagePathBanner)}" itemprop="image"/> 
29					</span> 
30				</#if> 
31 
32				<span class="card-body"> 
33					<span class="card-title" itemprop="name">${Nombre.data}</span> 
34					<#if validator.isNotNull(description)> 
35						<span class="card-text" itemprop="description">${description}</span> 
36					</#if> 
37					<button type="button" class="btn btn-outline-success mt-3" data-toggle="modal" data-target="#dialog-content-apps-1" > 
38						<span class="far fa-arrow-alt-circle-down"> 
39							<span class="hide-accessible">${languageUtil.get(request,"descargar-app")}</span> 
40						</span>	 
41						${languageUtil.get(request,'descargar-app')} 
42					</button> 
43 
44				</span> 
45 
46				<!-- Modal --> 
47				<div class="modal fade" id="dialog-content-apps-1" tabindex="-1" role="dialog" aria-labelledby="exampleModalCenterTitle" aria-hidden="true"> 
48					<div class="modal-dialog modal-dialog-centered w-100" role="document"> 
49						<div class="modal-content mx-auto w-auto"> 
50							<div class="modal-header"> 
51								<h6 class="modal-title" id="exampleModalLongTitle">${Nombre.data} - ${languageUtil.get(request,'descargar-app')}</h6> 
52								<button type="button" class="close" data-dismiss="modal" aria-label="Close"> 
53									<span aria-hidden="true">&times;</span> 
54								</button> 
55							</div> 
56							<div class="modal-body pb-4"> 
57								<div class="dialog-content-apps d-flex"> 
58									<!-- Metemos aquí los dos códigos QR y los enlaces --> 
59									<!-- https://chart.googleapis.com/chart?chs=500x500&cht=qr&chl=http://www.google.es --> 
60 
61									<#if validator.isNotNull(appStore)> 
62										<span class="qr-codes <#if validator.isNotNull(appStore) != validator.isNotNull(googlePlay)> qr-code-one-element </#if>"> 
63											<img src="https://chart.googleapis.com/chart?chs=200x200&cht=qr&chl=${appStore}" alt="${Nombre.data}" title="${Nombre.data}"/> 
64											<span class="app-download-link"> 
65												<a href="${appStore}" class="appstore-download-button" target="_blank" itemprop="url"> 
66													${languageUtil.format(request,'go-to-x','descargar-app')} 
67												</a> 
68											</span> 
69										</span> 
70									</#if> 
71									 
72 
73									<#if validator.isNotNull(googlePlay)> 
74										<span class="qr-codes <#if validator.isNotNull(appStore) != validator.isNotNull(googlePlay)> qr-code-one-element </#if>"> 
75											<img src="https://chart.googleapis.com/chart?chs=200x200&cht=qr&chl=${googlePlay}" alt="${Nombre.data}" title="${Nombre.data}"/> 
76											<span class="app-download-link"> 
77												<a href="${googlePlay}" class="googleplay-download-button" target="_blank" itemprop="url"> 
78													${languageUtil.format(request,'go-to-x','descargar-app')} 
79												</a> 
80											</span> 
81										</span> 
82									</#if> 
83								</div> 
84							</div> 
85						</div> 
86					</div> 
87				</div> 
88			</div> 
89		</div> 
90	</div> 
91</section> 
92 
93<style> 
94	.app-download-link a { 
95		display: block; 
96		text-indent: -1000000px; 
97		overflow: hidden; 
98		height: 52px; 
99		width: 154px; 
100		margin-left: 24px; 
101
102	a.appstore-download-button { 
103		/*background: url(/documents/53258/290213/apps-dialog-download-link-appstore-icon.png/ede32f80-a54f-4f8e-2d84-3972621a116e?t=1640772228596) no-repeat;*/ 
104		background: url(images/templates/apps-dialog-download-link-appstore-icon.png) no-repeat; 
105
106	.dialog-content-apps .app-download-link a.googleplay-download-button { 
107		/*background: url(/documents/53258/290213/apps-dialog-download-link-googleplay-icon.png/be3e8567-69c0-853c-1981-ef4a0705759d?t=1640772227019) no-repeat;*/ 
108		background: url(images/templates/apps-dialog-download-link-googleplay-icon.png) no-repeat; 
109
110	.modal { 
111		display: none; 
112
113</style>