null Colheitadeira e Plataforma de Soja

Um erro ocorreu enquanto processava o modelo. 
The following has evaluated to null or missing:
==> cur_photo.getAttribute("alt")  [in template "20102#20128#null" at line 6, column 37]

----
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: ${cur_photo.getAttribute("alt")}  [in template "20102#20128#null" at line 6, column 35]
----
1<dl><dt>Imagem de capa do anúncio:</dt><dd><a href="${card_image.getData()}"> 
2	${languageUtil.format(locale, "download-x", "Imagem de capa do anúncio", false)} 
3</a></dd><dt>Informações do bem à venda:</dt><dd>${text_content.getData()}</dd><dt>Fotografia da Galeria:</dt><dd><#if photo.getSiblings()?has_content> 
4	<#list photo.getSiblings() as cur_photo> 
5		<#if cur_photo.getData()?? && cur_photo.getData() != ""> 
6			<img alt="${cur_photo.getAttribute("alt")}" data-fileentryid="${cur_photo.getAttribute("fileEntryId")}" src="${cur_photo.getData()}" /> 
7		</#if> 
8	</#list> 
9</#if></dd></dl>