Membres d'un groupe de travail

The following has evaluated to null or missing:
==> assetCategoryLocalService.fetchAssetCategory(committeeCategoryId)  [in template "20099#20135#18019620" at line 10, column 21]

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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 category = assetCategoryLocal...  [in template "20099#20135#18019620" at line 10, column 1]
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1<#assign committeeCategoryId = 0/>

2<#if portletPreferences['queryValues0'] ??>

3    <#assign mapValues = portletPreferences['queryValues0'] />

4    <#list mapValues as value >

5        <#assign committeeCategoryId = value?number/>

6    </#list>

7</#if>

9<#assign assetCategoryLocalService = serviceLocator.findService("com.liferay.asset.kernel.service.AssetCategoryLocalService")>

10<#assign category = assetCategoryLocalService.fetchAssetCategory(committeeCategoryId)/>

11<#assign categoryName = category.getTitle(locale)/>

12<#if entries?has_content>

13    <#assign bipmCommonsService = serviceLocator.findService("org.bipm.portal.service.commons.asset.service.BipmAssetService")/>

14    <#assign sortedEntries = bipmCommonsService.sortEntriesByUrlTitle(entries,locale,portletPreferences)/>

15    <div class="working-group">

16        <div class="working-group__header">

17            <p class="working-group__header-title title-secondary">

18                <@liferay.language key="workinggroup.portlet.title" />

19            </p>

20        </div>

21        <div class="working-group__wrapper">

22            <select id="${randomNamespace}working-group-select">

23                <option value="">

24                    <@liferay.language key="dropdown.label.select" />

25                </option>

26                <#list sortedEntries as entry>

27                    <#assign assetRenderer = entry.getAssetRenderer() />

28                    <#assign className = assetRenderer.getClassName() />

29                    <#assign entryTitle = assetRenderer.getTitle(locale) />

30                    <#assign urlTitle = htmlUtil.escape(assetRenderer.getUrlTitle()) />

32                    <#if className == "org.bipm.portal.service.secretariat.model.WorkingGroup">

33                        <#assign renderedObject = assetRenderer.getAssetObject() />

34                        <option value="${portalUtil.getHomeURL(request)}${urlTitle}">

35                            ${renderedObject.getBipmId()}

36                        </option>

37                    </#if>

38                </#list>

39            </select>

40            <button class="btn btn-primary"

41                    onclick="window.location.href = document.getElementById('${randomNamespace}working-group-select').value;">

42                <@liferay.language key="view" />

43            </button>

44        </div>

45    </div>

46</#if>