The following has evaluated to null or missing:
==> classPK  [in template "37301#37343#16400421" at line 6, column 69]

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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: @opap["react-component"] name="Detail...  [in template "37301#37343#16400421" at line 6, column 5]
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1<#if entries?has_content> 

2    <#assign classPK = entries[0].classPK/> 

3</#if> 

4 

5<div class="opap-champions-detailed-page-wrapper"> 

6    <@opap["react-component"] name="DetailedAthletePage" classPK="${classPK}"/> 

7</div>