Comment puis je procéder au remboursement de mon billet ?

Une erreur s'est produite lors du traitement du modèle. 
The following has evaluated to null or missing:
==> ramUtils.getCurrentMarket(httpServletRequest)  [in template "64899143380625#20119#88538" at line 2, column 19]

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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 market = ramUtils.getCurrentM...  [in template "64899143380625#20119#88538" at line 2, column 1]
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1<#assign httpServletRequest = themeDisplay.getRequest()> 
2<#assign market = ramUtils.getCurrentMarket(httpServletRequest)> 
3<#assign language = themeDisplay.getLocale().getLanguage()> 
4 
5<section id="faq-details-content"> 
6  <br> 
7  <p> <a href="javascript:history.back()" class="red">&nbsp; &#8592; <@liferay.language key="back" /></a></p> 
8  <div class="container"> 
9    <p class="is-there pt-3 d-none d-lg-block ">${Question.getData()}</p> 
10    <div class="bagage-con"> 
11      <p class="pt-4 pb-4">${Answer.getData()}</p>  
12 
13     	<#if LinkFieldSet.Link.getFriendlyUrl() != "" && LinkText != ""> 
14            <a href="/${market}-${language}/{LinkFieldSet.Link.getFriendlyUrl()}" class="red"> 
15                ${LinkText.getData()} 
16            </a> 
17    	</#if> 
18      <p class="mt-5 mb-4 font-weight-bold"><@liferay.language key="faq-was-this-information-helpful" /></p> 
19      <div role="radiogroup" aria-label="<@liferay.language key="faq-was-this-information-helpful" />"> 
20          <input type="radio" id="Yes" name="helpful" value="1" checked> 
21          <label role="radio" tabindex="0" aria-checked="false" for="Yes" class="radio-inline mr-5"><@liferay.language key="yes" /></label>      
22          <input type="radio" id="No" name="helpful" value="0"> 
23          <label role="radio" tabindex="-1" aria-checked="false" for="No" class="radio-inline ml-5"><@liferay.language key="no" /></label>    
24      </div> 
25      <p class="mt-4 mb-0 pb-3"><@liferay.language key="faq-cant-find-your-answer" /> <a class="red" href="/${market}-${language}/information/nous-contacter"><@liferay.language key="faq-contact-us" /></a></p>   
26    </div>                    
27  </div> 
28</section>