در حین انجام عملیات خطایی رخ داده است.
The following has evaluated to null or missing:
==> content  [in template "20097#20123#38579" at line 5, column 3]

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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: ${content.getData()}  [in template "20097#20123#38579" at line 5, column 1]
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1<#if lead?? > 
2${lead.getData()} 
3</#if> 
4<br/> 
5${content.getData()}