Er trad een fout op tijdens de verwerking van de sjabloon. 
The following has evaluated to null or missing:
==> languages?filter(language -> language.isSelected())?first  [in template "32020#32062#285261" at line 4, column 34]

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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 currentLanguage = languages?f...  [in template "32020#32062#285261" at line 4, column 9]
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1<#assign languages=[] /> 
2<#if entries?has_content> 
3	<#assign languages=entries /> 
4	<#assign currentLanguage=languages?filter(language -> language.isSelected())?first /> 
5</#if> 
6 
7<div class="dropdown lang-icon" id="languages-selector"> 
8	<#if currentLanguage??> 
9		<#assign label=languageUtil.get(locale, "language-selector-alt" ) /> 
10 
11		<button 
12			class="d-flex align-items-center btn btn-secondary dropdown-toggle lfr-language-selector__current border-0 bg-transparent" 
13			type="button" id="langMenuButton" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false" 
14			aria-label="${label}" title="${label}"> 
15			<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" id="language" 
16				aria-hidden="true"> 
17				<path fill="#FFFFFF" 
18					d="M11.99 2C6.47 2 2 6.48 2 12s4.47 10 9.99 10C17.52 22 22 17.52 22 12S17.52 2 11.99 2zm6.93 6h-2.95c-.32-1.25-.78-2.45-1.38-3.56 1.84.63 3.37 1.91 4.33 3.56zM12 4.04c.83 1.2 1.48 2.53 1.91 3.96h-3.82c.43-1.43 1.08-2.76 1.91-3.96zM4.26 14C4.1 13.36 4 12.69 4 12s.1-1.36.26-2h3.38c-.08.66-.14 1.32-.14 2s.06 1.34.14 2H4.26zm.82 2h2.95c.32 1.25.78 2.45 1.38 3.56-1.84-.63-3.37-1.9-4.33-3.56zm2.95-8H5.08c.96-1.66 2.49-2.93 4.33-3.56C8.81 5.55 8.35 6.75 8.03 8zM12 19.96c-.83-1.2-1.48-2.53-1.91-3.96h3.82c-.43 1.43-1.08 2.76-1.91 3.96zM14.34 14H9.66c-.09-.66-.16-1.32-.16-2s.07-1.35.16-2h4.68c.09.65.16 1.32.16 2s-.07 1.34-.16 2zm.25 5.56c.6-1.11 1.06-2.31 1.38-3.56h2.95c-.96 1.65-2.49 2.93-4.33 3.56zM16.36 14c.08-.66.14-1.32.14-2s-.06-1.34-.14-2h3.38c.16.64.26 1.31.26 2s-.1 1.36-.26 2h-3.38z"> 
19				</path> 
20			</svg> 
21 
22			${getLanguageDisplayName(currentLanguage.getLanguageId())} 
23		</button> 
24	</#if> 
25 
26	<ul class="dropdown-menu dropdown-menu-right languages-dropdown-menu" id="sony-languages" 
27		aria-labelledby="langMenuButton"> 
28		<#list languages as language> 
29			<#assign activeCls="" /> 
30			<#assign normalizedDefaultLanguageId=getLanguageDisplayName(language.getLanguageId()) /> 
31 
32			<#if language.isSelected()> 
33				<#assign activeCls="selected" /> 
34			</#if> 
35 
36			<li class="" data-selected="${language.isSelected()?c}"> 
37				<#assign finalURL="#" /> 
38 
39				<#if language.getURL()??> 
40					<#assign finalURL=language.getURL()> 
41				</#if> 
42 
43				<a href="${finalURL}" class="lfr-language-selector__link dropdown-item ${activeCls}"> 
44					${normalizedDefaultLanguageId} 
45				</a> 
46			</li> 
47		</#list> 
48	</ul> 
49</div> 
50 
51<#function getLanguageDisplayName languageId> 
52	<#return stringUtil.toLowerCase(stringUtil.replace(languageId, "_" , "-" )) /> 
53</#function> 
Example Text