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#44559" at line 202, column 53]

----
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)??
----

----
FTL stack trace ("~" means nesting-related):
	- Failed at: #if !getterUtil.getBoolean(Titel_Verb...  [in template "20154#20194#44559" at line 202, column 25]
----
1<#-- OU Introductie.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 link_contact_formulier = group.getExpandoBridge().getAttribute("link_contact_formulier") /> 
12    <#assign Pagina_Koppeling = Pagina_Koppeling.getFriendlyUrl() /> 
13    <#assign Link_Koppeling = Link_Koppeling.getData() /> 
14 
15<#-- Default image --> 
16    <#assign link_default_image_general = group.getExpandoBridge().getAttribute("link_default_image_general") /> 
17 
18<#-- Site variablelen ophalen om het wetenschapsmenu op te halen --> 
19    <#assign home_informatica = (group.getExpandoBridge().getAttribute("home_informatica_en_informatiekunde"))!"" /> 
20    <#assign home_informatiekunde = (group.getExpandoBridge().getAttribute("home_informatiekunde"))!"" /> 
21    <#assign home_cultuur = (group.getExpandoBridge().getAttribute("home_cultuurwetenschappen"))!"" /> 
22    <#assign home_manamgement = (group.getExpandoBridge().getAttribute("home_managementwetenschappen"))!"" /> 
23    <#assign home_natuur = (group.getExpandoBridge().getAttribute("home_natuurwetenschappen"))!"" /> 
24    <#assign home_onderwijs = (group.getExpandoBridge().getAttribute("home_onderwijswetenschappen"))!"" /> 
25    <#assign home_psychologie = (group.getExpandoBridge().getAttribute("home_psychologie"))!"" /> 
26    <#assign home_rechten = (group.getExpandoBridge().getAttribute("home_rechtswetenschappen"))!"" /> 
27    <#assign home_wetenschapsgebieden = (group.getExpandoBridge().getAttribute("home_wetenschapsgebieden"))!"" /> 
28    <#assign op_de_hoogte_blijven = "" /> 
29    <#assign link_infomagazine = "" /> 
30    <#assign link_brochure = "" /> 
31 
32    <#assign link_home_informatica= "/web/erfgoedplatform/" + home_informatica /> 
33    <#assign link_home_informatiekunde= "/web/erfgoedplatform/" + home_informatiekunde /> 
34    <#assign link_home_cultuur = "/web/erfgoedplatform/" + home_cultuur /> 
35    <#assign link_home_manamgement = "/web/erfgoedplatform/" + home_manamgement /> 
36    <#assign link_home_psychologie = "/web/erfgoedplatform/" + home_psychologie /> 
37    <#assign link_home_natuur = "/web/erfgoedplatform/" + home_natuur /> 
38    <#assign link_home_onderwijs = "/web/erfgoedplatform/" + home_onderwijs /> 
39    <#assign link_home_rechten = "/web/erfgoedplatform/" + home_rechten /> 
40    <#assign link_home_wetenschap = "/web/erfgoedplatform/" + home_wetenschapsgebieden /> 
41 
42<#-- Twitter en Facebook URL genereren --> 
43    <#assign Current_URL = request.getAttribute("CURRENT_COMPLETE_URL") /> 
44    <#assign twitter_URL = httpUtil.encodeURL(Current_URL) /> 
45    <#assign facebook_URL = Current_URL /> 
46    <#assign InleidingAsPlainText = Inleiding.getData()?replace("<.*?>","","r") /> 
47    <#assign mailto = "mailto:?subject=" + languageUtil.get(locale, 'GELEZEN_OP_OU_NL') + " " + .vars['reserved-article-title'].data + "&body=" + InleidingAsPlainText + " [" + Current_URL + "]" /> 
48 
49<#-- Contact persoon informatie ophalen --> 
50    <#assign Persoon_Tonen = "false" /> 
51 
52    <#if Persoon.getChild("Persoon_Tonen").getData()=="true"> 
53        <#assign Persoon_Tonen = "true" /> 
54        <#assign Persoon_Gebruikersacroniem = Persoon.getChild("Persoon_Gebruikersacroniem").getData() /> 
55        <#assign Persoon_Naam = Persoon.getChild("Persoon_Naam").getData() /> 
56        <#assign Persoon_Titel = Persoon.getChild("Persoon_Titel").getData() /> 
57        <#if Persoon.Persoon_Gebruikersacroniem.getData() != ""> 
58            <#assign Persoon_Foto_URL = userpics_url + Persoon.Persoon_Foto_Url.getData() /> 
59        <#else> 
60            <#assign Persoon_Foto_URL = Persoon.Persoon_Foto_Url.getData() /> 
61        </#if> 
62        <#if Persoon_Functie?has_content && Persoon_Functie != ""> 
63            <#assign Persoon_Functie = Persoon.Persoon_Functie.getData() /> 
64        </#if> 
65    </#if> 
66 
67<#-- category name --> 
68    <#assign vocLocalService = serviceLocator.findService("com.liferay.asset.kernel.service.AssetVocabularyLocalService") /> 
69    <#assign catLocalService = serviceLocator.findService("com.liferay.asset.kernel.service.AssetCategoryLocalService") /> 
70    <#assign companyGroupId = themeDisplay.getCompanyGroupId() /> 
71    <#assign vocabulary = vocLocalService.getGroupVocabulary(companyGroupId,"Wetenschapsgebied") /> 
72    <#assign vocabularyId = vocabulary.vocabularyId /> 
73    <#assign articleCatNames = catLocalService.getCategoryNames("com.liferay.journal.model.JournalArticle", getterUtil.getLong(articlePrimKey)) /> 
74    <#assign categories = catLocalService.getCategories("com.liferay.journal.model.JournalArticle", getterUtil.getLong(articlePrimKey)) /> 
75    <#assign categoryName = "corporate" /> 
76        <#list categories as category> 
77            <#if category.vocabularyId == vocabularyId> 
78                <#assign categoryName = category.getName() /> 
79                <#assign categoryName = categoryName?replace("\\W", " ", "r")?replace("\\s+", "-", "r")?lower_case /> 
80                <#if categoryName?starts_with("-")> 
81                    <#assign categoryName = categoryName?string[1] /> 
82                </#if> 
83            </#if> 
84        </#list> 
85 
86    <#if locale.toString()?contains("nl_NL")> 
87        <#assign informatiekunde = "Informatiekunde" /> 
88    <#else> 
89        <#assign informatiekunde = "Information science" /> 
90    </#if> 
91 
92    <#assign algemenePagina = false /> 
93 
94    <#assign colorKey = " bg--corporate " /> 
95        <#assign quickFocus = " " /> 
96    <#if categoryName == "cultuurwetenschappen"> 
97        <#assign colorKey = " bg--cw " /> 
98        <#assign areaName = languageUtil.get(locale, 'KUNST_EN_CULTUUR') /> 
99        <#assign op_de_hoogte_blijven = group.getExpandoBridge().getAttribute("link_blijfopdehoogte_kunstencultuur") /> 
100        <#assign link_infomagazine = group.getExpandoBridge().getAttribute("link_infomagazine_kunstencultuur") /> 
101        <#assign link_brochure = group.getExpandoBridge().getAttribute("link_brochure_kunstencultuur") /> 
102    <#elseif categoryName == "milieu-natuurwetenschappen" || categoryName == "natuurwetenschappen" /> 
103        <#assign colorKey = " bg--nw " /> 
104        <#assign areaName = languageUtil.get(locale, 'DUURZ_AMP_MILLIEU') /> 
105        <#assign op_de_hoogte_blijven = group.getExpandoBridge().getAttribute("link_blijfopdehoogte_duurzaamheidenmillieu") /> 
106        <#assign link_infomagazine = group.getExpandoBridge().getAttribute("link_infomagazine_duurzaamheidenmillieu") /> 
107        <#assign link_brochure = group.getExpandoBridge().getAttribute("link_brochure_duurzaamheidenmillieu") /> 
108    <#elseif categoryName == "informatica-en-informatiekunde" || categoryName == "informatica" /> 
109        <#assign colorKey = " bg--inf " /> 
110        <#assign areaName = languageUtil.get(locale, 'INFORMATICA') /> 
111        <#assign op_de_hoogte_blijven = group.getExpandoBridge().getAttribute("link_blijfopdehoogte_informatica") /> 
112        <#assign link_infomagazine = group.getExpandoBridge().getAttribute("link_infomagazine_informatica") /> 
113        <#assign link_brochure = group.getExpandoBridge().getAttribute("link_brochure_informatica") /> 
114    <#elseif categoryName == "informatiekunde" /> 
115        <#assign colorKey = " bg--inf " /> 
116        <#assign areaName = informatiekunde /> 
117        <#assign op_de_hoogte_blijven = group.getExpandoBridge().getAttribute("link_blijfopdehoogte_informatiekunde") /> 
118        <#assign link_infomagazine = group.getExpandoBridge().getAttribute("link_infomagazine_informatiekunde") /> 
119        <#assign link_brochure = group.getExpandoBridge().getAttribute("link_brochure_informatiekunde") /> 
120    <#elseif categoryName == "managementwetenschappen" /> 
121        <#assign colorKey = " bg--mw " /> 
122        <#assign areaName = languageUtil.get(locale, 'MANAGEMENT') /> 
123        <#assign op_de_hoogte_blijven = group.getExpandoBridge().getAttribute("link_blijfopdehoogte_management") /> 
124        <#assign link_infomagazine = group.getExpandoBridge().getAttribute("link_infomagazine_management") /> 
125        <#assign link_brochure = group.getExpandoBridge().getAttribute("link_brochure_management") /> 
126    <#elseif categoryName == "onderwijswetenschappen" /> 
127        <#assign colorKey = " bg--ow " /> 
128        <#assign areaName = languageUtil.get(locale, 'ONDERWIJS') /> 
129        <#assign op_de_hoogte_blijven = group.getExpandoBridge().getAttribute("link_blijfopdehoogte_onderwijs") /> 
130        <#assign link_infomagazine = group.getExpandoBridge().getAttribute("link_infomagazine_onderwijs") /> 
131        <#assign link_brochure = group.getExpandoBridge().getAttribute("link_brochure_onderwijs") /> 
132    <#elseif categoryName == "psychologie" /> 
133        <#assign colorKey = " bg--psy " /> 
134        <#assign areaName = languageUtil.get(locale, 'PSYCHOLOGIE') /> 
135        <#assign op_de_hoogte_blijven = group.getExpandoBridge().getAttribute("link_blijfopdehoogte_psychologie") /> 
136        <#assign link_infomagazine = group.getExpandoBridge().getAttribute("link_infomagazine_psychologie") /> 
137        <#assign link_brochure = group.getExpandoBridge().getAttribute("link_brochure_psychologie") /> 
138    <#elseif categoryName == "rechtswetenschappen" /> 
139        <#assign colorKey = " bg--rw " /> 
140        <#assign areaName = languageUtil.get(locale, 'RECHTEN') /> 
141        <#assign op_de_hoogte_blijven = group.getExpandoBridge().getAttribute("link_blijfopdehoogte_rechten") /> 
142        <#assign link_infomagazine = group.getExpandoBridge().getAttribute("link_infomagazine_rechten") /> 
143        <#assign link_brochure = group.getExpandoBridge().getAttribute("link_brochure_rechten") /> 
144    <#else> 
145        <#assign areaName = languageUtil.get(locale, 'WETENSCHAPS_GEBIEDEN') /> 
146        <#assign algemenePagina = true /> 
147    </#if> 
148 
149<#-- Sfeerbeeld --> 
150    <#if Sfeerbeeld?has_content> 
151        <#assign sfeerbeeld_url = Sfeerbeeld.getData() /> 
152    <#else> 
153        <#assign sfeerbeeld_url = link_default_image_general /> 
154    </#if> 
155 
156<#-- Contactformulier URL --> 
157    <#assign linkcontactformulierurl = "/web/erfgoedplatform/" + link_contact_formulier /> 
158    <#if Pagina_Koppeling != ""> 
159        <#assign linkcontactformulierurl = Pagina_Koppeling /> 
160    <#elseif Link_Koppeling != ""> 
161        <#assign linkcontactformulierurl = Link_Koppeling /> 
162    </#if> 
163 
164    <#if locale.toString() == "nl_NL"> 
165        <#assign brochureaanvragen = "Studiegids aanvragen" /> 
166    <#else> 
167        <#assign brochureaanvragen = "Request study guide" /> 
168    </#if> 
169 
170<!-- START FULL IMAGE --> 
171<section class="container-fluid section padding-top padding-bottom-large" ou-aera="${categoryName}"> 
172    <div class="full-image full-image--home"> 
173        <div class="full-image__bg"> 
174             <div class="full-image__bg__img" style="background: url('${sfeerbeeld_url}') no-repeat center; background-size: cover; z-index:1;"></div> 
175            <div class="gradient" style="z-index:0;"></div> 
176        </div> 
177 
178        <div class="full-image__content"> 
179            <div class="layout__content-container"> 
180                <div class="row"> 
181                    <div class="col-md-12"> 
182                        <#if getterUtil.getBoolean(Wetenschapsmenu_weergeven.getData())> 
183                            <div class="custom-dropdown"> 
184                                <div class="custom-dropdown__btn"> 
185                                    ${areaName} <span class="fa fa-caret-down"></span> 
186                                </div> 
187                                <div class="custom-dropdown__menu"> 
188                                    <ul> 
189                                        <li><a href="${link_home_wetenschap}" target="_self"><@liferay.language key="WETENSCHAPS_GEBIEDEN" /></a></li> 
190                                        <li><a href="${link_home_informatica}" target="_self"><@liferay.language key="INFORMATICA" /></a></li> 
191                                        <li><a href="${link_home_informatiekunde}" target="_self">${informatiekunde}</a></li> 
192                                        <li><a href="${link_home_cultuur}" target="_self"><@liferay.language key="KUNST_EN_CULTUUR" /></a></li> 
193                                        <li><a href="${link_home_psychologie}" target="_self"><@liferay.language key="PSYCHOLOGIE" /></a></li> 
194                                        <li><a href="${link_home_manamgement}" target="_self"><@liferay.language key="MANAGEMENT" /></a></li> 
195                                        <li><a href="${link_home_natuur}" target="_self"><@liferay.language key="DUURZ_AMP_MILLIEU" /></a></li> 
196                                        <li><a href="${link_home_rechten}" target="_self"><@liferay.language key="RECHTEN" /></a></li> 
197                                        <li><a href="${link_home_onderwijs}" target="_self"><@liferay.language key="ONDERWIJS" /></a></li> 
198                                    </ul> 
199                                </div> 
200                            </div> 
201                        </#if> 
202                        <#if !getterUtil.getBoolean(Titel_Verbergen.getData())> 
203                        <div class="full-image__content__title">${.vars['reserved-article-title'].data}</div> 
204                        </#if> 
205                    </div> 
206                </div> 
207            </div> 
208        </div> 
209    </div> 
210</section> 
211<!-- END FULL IMAGE --> 
212 
213<!-- START SECTION - CONTENT INTRO --> 
214<section class="container-fluid section"> 
215    <div class="layout__content-container"> 
216        <div class="content"> 
217            <div class="row"> 
218                <div class="content__left col-xs-12 col-md-8 pull-top"> 
219                    <div class="intro__content ${colorKey}"> 
220                        <h1 class="intro__title"> 
221                            ${Introductie_Titel.getData()} 
222                        </h1> 
223                        <div class="paragraph--intro"> 
224                            ${Inleiding.getData()} 
225                        </div> 
226                        <div class="intro__content__inner"> 
227                            ${Artikel.getData()} 
228                        </div> 
229                        <div class="social-media social-media__intro"> 
230                            <ul class="social-media__container"> 
231                                <li class="social-media__item"><a href="${mailto}" class="fa fa-envelope-o"></a></li> 
232                                <li class="social-media__item"><a onclick="printFunction()" class="fa fa-print"></a></li> 
233                            </ul> 
234                        </div> 
235                    </div> 
236                </div> 
237 
238                <div class="content__right col-xs-12 col-md-4"> 
239                    <div class="intro__right"> 
240                        <#if Persoon_Tonen=="true"> 
241                            <div class="person"> 
242                                <div class="person__container"> 
243                                    <#if Persoon.Persoon_Foto_Url.getData() != ""> 
244                                        <div class="person__photo person__photo__large" style="background: url(${Persoon_Foto_URL}) no-repeat center; background-size: cover;"></div> 
245                                    </#if> 
246                                    <div class="person__name">${Persoon_Titel} ${Persoon_Naam}</div> 
247                                    <#if Persoon_Functie?has_content && Persoon_Functie != ""> 
248                                        <div class="person__function">${Persoon_Functie}</div> 
249                                    </#if> 
250                                </div> 
251                            </div> 
252                        </#if> 
253 
254                        <div class="content__right__actions"> 
255                            <#if !algemenePagina && op_de_hoogte_blijven != ""> 
256                                <a href="${op_de_hoogte_blijven}" class="btn btn--center btn--primary"><@liferay.language key="OP_DE_HOOGTE_BLIJVEN" /></a> 
257                            </#if> 
258                            <a href="${linkcontactformulierurl}" class="btn btn--center btn--tertiary"><@liferay.language key="VRAAG_STELLEN" /></a> 
259                            <#if !algemenePagina && link_infomagazine != ""> 
260                                <a href="${link_infomagazine}" class="btn btn--center btn--tertiary">Infomagazine</a> 
261                            </#if> 
262                            <#if !algemenePagina && link_brochure != ""> 
263                                <a href="${link_brochure}" class="btn btn--center btn--tertiary">${brochureaanvragen}</a> 
264                            </#if> 
265                        </div> 
266                    </div> 
267                </div> 
268            </div> 
269        </div> 
270    </div> 
271</section> 
272<!-- END SECTION - CONTENT INTRO -->