Login Cartão de Cidadão - Erro

An error occurred while processing the template.
The following has evaluated to null or missing:
==> request.getParameter(paramName)  [in template "155#195#5878290" at line 27, column 24]

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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 errorToShow = request.getPara...  [in template "155#195#5878290" at line 27, column 1]
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1<#--Take layout id--> 
2<#assign layoutId = themeDisplay.getPlid> 
3<#-- get the service for layout--> 
4<#assign layoutLocalService = serviceLocator.findService("com.liferay.portal.kernel.service.LayoutLocalService")> 
5<#assign urlCodec = staticUtil["com.liferay.portal.kernel.util.URLCodec"]> 
6<#--take a layout object--> 
7<#assign layout = themeDisplay.getLayout()> 
8 
9<#assign pageName = layout.getName(locale)> 
10 
11<#setting locale = localeUtil.getDefault()> 
12 
13<#-- get Date object--> 
14<#assign modifieddate = .vars['reserved-article-modified-date'].data> 
15<#-- get format Date--> 
16<#assign modDateFormat = modifieddate?datetime("EEE, d MMM yyyy HH:mm:ss Z")> 
17 
18<#if layout.getExpandoBridge().getAttribute("isTabPage") == false>     
19    <h1 id="genericPageTitle"><span class="webContentPageTitle">${pageName}</span></h1> 
20</#if>  
21<#-- get Date object--> 
22<#assign modifieddate = .vars['reserved-article-modified-date'].data> 
23<#-- get format Date--> 
24<#assign modDateFormat = modifieddate?datetime("EEE, d MMM yyyy HH:mm:ss Z")> 
25 
26<#assign paramName = "error"> 
27<#assign errorToShow = request.getParameter(paramName)> 
28 
29<#assign classDivContent = "webContentModifiedDate" > 
30<#if layout.getExpandoBridge().getAttribute("isTabPage") == true>  
31    <#assign classDivContent = "webContentModifiedDate webContentModifiedDateTapPage"> 
32</#if> 
33 
34<div class="${classDivContent}" > 
35    <div class="webContentPrint" onclick="printElem('webContentMainDiv');"></div>  
36</div> 
37<div id="webContentMainDiv" class="webContentMainDiv"> 
38 
39    <div class="portlet-msg-error" style="background-color: #fee5e2;border-color: #fcaca5;color: #b50303;"> 
40	<@liferay.language key="error.application.access" /><br/> 
41        <#if errorToShow != ""> 
42	        <div id="portlet-msg-error-detail" style="margin-top:30px;"> 
43	        <@liferay.language key="error.details" /><br/> 
44	            <b> 
45		            <i>${urlCodec.decodeURL(errorToShow)}<i> 
46	            </b> 
47            </div> 
48        </#if> 
49    </div> 
50</div>