Er trad een fout op tijdens de verwerking van de sjabloon.
The following has evaluated to null or missing:
==> Titel_Verbergen  [in template "20154#20194#68321" at line 174, column 53]

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Tip: If the failing expression is known to be 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 !getterUtil.getBoolean(Titel_Verb...  [in template "20154#20194#68321" at line 174, column 25]
----
1<#-- OU Introductie Onderzoek.ftl, 27-05-2020 --> 
2 
3    <#assign journalArticleLocalService = serviceLocator.findService("com.liferay.journal.service.JournalArticleLocalService") /> 
4    <#assign journalArticle = journalArticleLocalService.getArticle(getterUtil.getLong(groupId), .vars['reserved-article-id'].data) /> 
5    <#assign articlePrimKey = journalArticle.getResourcePrimKey() /> 
6 
7<#-- Site variabelen ophalen om de link naar aanmelden en e-mailen --> 
8    <#assign groupService = serviceLocator.findService("com.liferay.portal.kernel.service.GroupLocalService") /> 
9    <#assign group = themeDisplay.getScopeGroup() /> 
10    <#assign userpics_url = group.getExpandoBridge().getAttribute("base_url_voor_userpics") /> 
11    <#assign sfeerbeeld_url = Sfeerbeeld.getData() /> 
12    <#assign link_contact_formulier = group.getExpandoBridge().getAttribute("link_contact_formulier") /> 
13    <#assign Pagina_Koppeling = Pagina_Koppeling.getFriendlyUrl() /> 
14    <#assign Link_Koppeling = Link_Koppeling.getData() /> 
15    <#assign op_de_hoogte_blijven = "" /> 
16 
17<#-- Twitter en Facebook URL genereren --> 
18    <#assign Current_URL = request.getAttribute("CURRENT_COMPLETE_URL") /> 
19    <#assign twitter_URL = httpUtil.encodeURL(Current_URL) /> 
20    <#assign facebook_URL = Current_URL /> 
21    <#assign InleidingAsPlainText = Inleiding.getData()?replace("<.*?>","","r") /> 
22    <#assign mailto = "mailto:?subject=" + languageUtil.get(locale, 'GELEZEN_OP_OU_NL') + " " + .vars['reserved-article-title'].data + "&body=" + InleidingAsPlainText + " [" + Current_URL + "]" /> 
23 
24<#-- Contact persoon informatie ophalen --> 
25    <#assign Persoon_Tonen = "false" /> 
26 
27    <#if Persoon.getChild("Persoon_Tonen").getData()=="true"> 
28        <#assign Persoon_Tonen = "true" /> 
29        <#assign Persoon_Gebruikersacroniem = Persoon.getChild("Persoon_Gebruikersacroniem").getData() /> 
30        <#assign Persoon_Naam = Persoon.getChild("Persoon_Naam").getData() /> 
31        <#assign Persoon_Titel = Persoon.getChild("Persoon_Titel").getData() /> 
32        <#if Persoon.Persoon_Gebruikersacroniem.getData() != ""> 
33            <#assign Persoon_Foto_URL = userpics_url + Persoon.Persoon_Foto_Url.getData() /> 
34        <#else> 
35            <#assign Persoon_Foto_URL = Persoon.Persoon_Foto_Url.getData() /> 
36        </#if> 
37        <#if Persoon_Functie?has_content && Persoon_Functie != ""> 
38            <#assign Persoon_Functie = Persoon.Persoon_Functie.getData() /> 
39        </#if> 
40    </#if> 
41 
42    <#if locale.toString()?contains("nl_NL")> 
43        <#assign informatiekunde = "Informatiekunde" /> 
44    <#else> 
45        <#assign informatiekunde = "Information science" /> 
46    </#if> 
47 
48    <#assign home_informatica = (group.getExpandoBridge().getAttribute("home_onderzoek_informatica_en_informatiekunde"))!"" /> 
49    <#assign home_informatiekunde = (group.getExpandoBridge().getAttribute("home_onderzoek_informatiekunde"))!"" /> 
50    <#assign home_cultuur = (group.getExpandoBridge().getAttribute("home_onderzoek_cultuurwetenschappen"))!"" /> 
51    <#assign home_manamgement = (group.getExpandoBridge().getAttribute("home_onderzoek_managementwetenschappen"))!"" /> 
52    <#assign home_natuur = (group.getExpandoBridge().getAttribute("home_onderzoek_natuurwetenschappen"))!"" /> 
53    <#assign home_onderwijs = (group.getExpandoBridge().getAttribute("home_onderzoek_onderwijswetenschappen"))!"" /> 
54    <#assign home_psychologie = (group.getExpandoBridge().getAttribute("home_onderzoek_psychologie"))!"" /> 
55    <#assign home_rechten = (group.getExpandoBridge().getAttribute("home_onderzoek_rechtswetenschappen"))!"" /> 
56    <#assign home_wetenschapsgebieden = (group.getExpandoBridge().getAttribute("home_onderzoek_wetenschapsgebieden"))!"" /> 
57 
58    <#assign link_home_informatica= "/web/incompany-milieuadvies/" + home_informatica /> 
59    <#assign link_home_informatiekunde= "/web/incompany-milieuadvies/" + home_informatiekunde /> 
60    <#assign link_home_cultuur = "/web/incompany-milieuadvies/" + home_cultuur /> 
61    <#assign link_home_manamgement = "/web/incompany-milieuadvies/" + home_manamgement /> 
62    <#assign link_home_psychologie = "/web/incompany-milieuadvies/" + home_psychologie /> 
63    <#assign link_home_natuur = "/web/incompany-milieuadvies/" + home_natuur /> 
64    <#assign link_home_onderwijs = "/web/incompany-milieuadvies/" + home_onderwijs /> 
65    <#assign link_home_rechten = "/web/incompany-milieuadvies/" + home_rechten /> 
66    <#assign link_home_wetenschap = "/web/incompany-milieuadvies/" + home_wetenschapsgebieden /> 
67 
68<#-- category name --> 
69    <#assign vocLocalService = serviceLocator.findService("com.liferay.asset.kernel.service.AssetVocabularyLocalService") /> 
70    <#assign catLocalService = serviceLocator.findService("com.liferay.asset.kernel.service.AssetCategoryLocalService") /> 
71    <#assign companyGroupId = themeDisplay.getCompanyGroupId() /> 
72    <#assign vocabulary = vocLocalService.getGroupVocabulary(companyGroupId,"Wetenschapsgebied") /> 
73    <#assign vocabularyId = vocabulary.vocabularyId /> 
74    <#assign articleCatNames = catLocalService.getCategoryNames("com.liferay.journal.model.JournalArticle", getterUtil.getLong(articlePrimKey)) /> 
75    <#assign categories = catLocalService.getCategories("com.liferay.journal.model.JournalArticle", getterUtil.getLong(articlePrimKey)) /> 
76    <#assign categoryName = "corporate" /> 
77        <#list categories as category> 
78            <#if category.vocabularyId == vocabularyId> 
79                <#assign categoryName = category.getName() /> 
80                <#assign categoryName = categoryName?replace("\\W", " ", "r")?replace("\\s+", "-", "r")?lower_case /> 
81                <#if categoryName?starts_with("-")> 
82                    <#assign categoryName = categoryName?string[1] /> 
83                </#if> 
84            </#if> 
85        </#list> 
86 
87    <#assign algemenePagina = false /> 
88 
89    <#assign colorKey = " bg--corporate " /> 
90        <#assign quickFocus = " " /> 
91    <#if categoryName == "cultuurwetenschappen"> 
92        <#assign colorKey = " bg--cw " /> 
93        <#assign areaName = languageUtil.get(locale, 'KUNST_EN_CULTUUR') /> 
94        <#assign op_de_hoogte_blijven = group.getExpandoBridge().getAttribute("link_blijfopdehoogte_kunstencultuur") /> 
95    <#elseif categoryName == "milieu-natuurwetenschappen" || categoryName == "natuurwetenschappen" /> 
96        <#assign colorKey = " bg--nw " /> 
97        <#assign areaName = languageUtil.get(locale, 'DUURZ_AMP_MILLIEU') /> 
98        <#assign op_de_hoogte_blijven = group.getExpandoBridge().getAttribute("link_blijfopdehoogte_duurzaamheidenmillieu") /> 
99    <#elseif categoryName == "informatica-en-informatiekunde" || categoryName == "informatica" /> 
100        <#assign colorKey = " bg--inf " /> 
101        <#assign areaName = languageUtil.get(locale, 'INFORMATICA') /> 
102        <#assign op_de_hoogte_blijven = group.getExpandoBridge().getAttribute("link_blijfopdehoogte_informatica") /> 
103    <#elseif categoryName == "informatiekunde" /> 
104        <#assign colorKey = " bg--inf " /> 
105        <#assign areaName = informatiekunde /> 
106        <#assign op_de_hoogte_blijven = group.getExpandoBridge().getAttribute("link_blijfopdehoogte_informatiekunde") /> 
107    <#elseif categoryName == "managementwetenschappen" /> 
108        <#assign colorKey = " bg--mw " /> 
109        <#assign areaName = languageUtil.get(locale, 'MANAGEMENT') /> 
110        <#assign op_de_hoogte_blijven = group.getExpandoBridge().getAttribute("link_blijfopdehoogte_management") /> 
111    <#elseif categoryName == "onderwijswetenschappen" /> 
112        <#assign colorKey = " bg--ow " /> 
113        <#assign areaName = languageUtil.get(locale, 'ONDERWIJS') /> 
114        <#assign op_de_hoogte_blijven = group.getExpandoBridge().getAttribute("link_blijfopdehoogte_onderwijs") /> 
115    <#elseif categoryName == "psychologie" /> 
116        <#assign colorKey = " bg--psy " /> 
117        <#assign areaName = languageUtil.get(locale, 'PSYCHOLOGIE') /> 
118        <#assign op_de_hoogte_blijven = group.getExpandoBridge().getAttribute("link_blijfopdehoogte_psychologie") /> 
119    <#elseif categoryName == "rechtswetenschappen" /> 
120        <#assign colorKey = " bg--rw " /> 
121        <#assign areaName = languageUtil.get(locale, 'RECHTEN') /> 
122        <#assign op_de_hoogte_blijven = group.getExpandoBridge().getAttribute("link_blijfopdehoogte_rechten") /> 
123    <#else> 
124        <#assign areaName = languageUtil.get(locale, 'WETENSCHAPS_GEBIEDEN') /> 
125        <#assign algemenePagina = true /> 
126    </#if> 
127 
128<#-- Contactformulier URL --> 
129    <#assign linkcontactformulierurl = "/web/incompany-milieuadvies/" + link_contact_formulier /> 
130    <#if Pagina_Koppeling != ""> 
131        <#assign linkcontactformulierurl = Pagina_Koppeling /> 
132    <#elseif Link_Koppeling != ""> 
133        <#assign linkcontactformulierurl = Link_Koppeling /> 
134    </#if> 
135 
136<script type="text/javascript"> 
137    function printFunction() { 
138        window.print(); 
139
140</script> 
141 
142<!-- START FULL IMAGE --> 
143<section class="container-fluid section padding-top padding-bottom-large" ou-aera="${categoryName}"> 
144    <div class="full-image full-image--home"> 
145        <div class="full-image__bg"> 
146              <div class="full-image__bg__img" style="background: url('${sfeerbeeld_url}') no-repeat center; background-size: cover; z-index:1;"></div> 
147            <div class="gradient" style="z-index:0;"></div> 
148        </div> 
149 
150        <div class="full-image__content"> 
151            <div class="layout__content-container"> 
152                    <div class="row"> 
153                    <div class="col-md-12"> 
154                        <#if getterUtil.getBoolean(Wetenschapsmenu_weergeven.getData())> 
155                            <div class="custom-dropdown"> 
156                                <div class="custom-dropdown__btn"> 
157                                    ${areaName} <span class="fa fa-caret-down"></span> 
158                                </div> 
159                                <div class="custom-dropdown__menu"> 
160                                    <ul> 
161                                        <li><a href="${link_home_wetenschap}" target="_self"><@liferay.language key="WETENSCHAPS_GEBIEDEN" /></a></li> 
162                                        <li><a href="${link_home_informatica}" target="_self"><@liferay.language key="INFORMATICA" /></a></li> 
163                                        <li><a href="${link_home_informatiekunde}" target="_self">${informatiekunde}</a></li> 
164                                        <li><a href="${link_home_cultuur}" target="_self"><@liferay.language key="KUNST_EN_CULTUUR" /></a></li> 
165                                        <li><a href="${link_home_psychologie}" target="_self"><@liferay.language key="PSYCHOLOGIE" /></a></li> 
166                                        <li><a href="${link_home_manamgement}" target="_self"><@liferay.language key="MANAGEMENT" /></a></li> 
167                                        <li><a href="${link_home_natuur}" target="_self"><@liferay.language key="DUURZ_AMP_MILLIEU" /></a></li> 
168                                        <li><a href="${link_home_rechten}" target="_self"><@liferay.language key="RECHTEN" /></a></li> 
169                                        <li><a href="${link_home_onderwijs}" target="_self"><@liferay.language key="ONDERWIJS" /></a></li> 
170                                    </ul> 
171                                </div> 
172                            </div> 
173                        </#if> 
174                        <#if !getterUtil.getBoolean(Titel_Verbergen.getData())> 
175                        <div class="full-image__content__title">${.vars['reserved-article-title'].data}</div> 
176                        </#if> 
177                    </div> 
178                </div> 
179            </div> 
180        </div> 
181    </div> 
182</section> 
183<!-- END FULL IMAGE --> 
184 
185<!-- START SECTION - CONTENT INTRO --> 
186<section class="container-fluid section"> 
187    <div class="layout__content-container"> 
188        <div class="content"> 
189            <div class="row"> 
190                <div class="content__left col-xs-12 col-md-8 pull-top"> 
191                    <div class="intro__content ${colorKey}"> 
192                        <h1 class="intro__title"> 
193                            ${Introductie_Titel.getData()} 
194                        </h1> 
195                        <div class="paragraph--intro"> 
196                            ${Inleiding.getData()} 
197                        </div> 
198                        <div class="intro__content__inner"> 
199                            ${Artikel.getData()} 
200                        </div> 
201                        <div class="social-media social-media__intro"> 
202                            <ul class="social-media__container"> 
203                                <li class="social-media__item"><a href="${mailto}" class="fa fa-envelope-o"></a></li> 
204                                <li class="social-media__item"><a onclick="printFunction()" class="fa fa-print"></a></li> 
205                            </ul> 
206                        </div> 
207                    </div> 
208                </div> 
209 
210                <div class="content__right col-xs-12 col-md-4"> 
211                    <div class="intro__right"> 
212                        <#if Persoon_Tonen=="true"> 
213                            <div class="person"> 
214                                <div class="person__container"> 
215                                    <#if Persoon.Persoon_Foto_Url.getData() != ""> 
216                                        <div class="person__photo person__photo__large" style="background: url(${Persoon_Foto_URL}) no-repeat center; background-size: cover;"></div> 
217                                    </#if> 
218                                    <div class="person__name">${Persoon_Titel} ${Persoon_Naam}</div> 
219                                    <#if Persoon_Functie?has_content && Persoon_Functie != ""> 
220                                        <div class="person__function">${Persoon_Functie}</div> 
221                                    </#if> 
222                                </div> 
223                            </div> 
224                        </#if> 
225                        <div class="content__right__actions"> 
226                            <a href="${linkcontactformulierurl}" class="btn btn--center btn--tertiary"><@liferay.language key="VRAAG_STELLEN" /></a> 
227                        </div> 
228                    </div> 
229                </div> 
230            </div> 
231        </div> 
232    </div> 
233</section> 
234<!-- END SECTION - CONTENT INTRO -->