تست - مرکز رشد

The following has evaluated to null or missing:
==> cur_DPsubTitle.number  [in template "10110#1613426#3207920" at line 16, column 80]

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Tip: It's the step after the last dot that caused this error, not those before it.
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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)??
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FTL stack trace ("~" means nesting-related):
	- Failed at: ${cur_DPsubTitle.number.getData()}  [in template "10110#1613426#3207920" at line 16, column 78]
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1<style> 

2	.technology-unit.establishment ul li a h2	{     

3		display: flex; 

4		justify-content: center;    align-items: center; 

5		} 

6</style> 

7 

8 

9<div class="technology-unit establishment"> 

10    <h1>${DPtitle.getData()}</h1> 

11    <ul> 

12		<#if DPsubTitle.getSiblings()?has_content>  

13			<#list DPsubTitle.getSiblings() as cur_DPsubTitle>  

14				<li> 

15					<a href="${cur_DPsubTitle.DPlink.getData()}"> 

16						<span class="counter-number">${cur_DPsubTitle.number.getData()}</span> 

17						<h2>${cur_DPsubTitle.getData()}</h2> 

18						${cur_DPsubTitle.DPlogo.getData()} 

19					</a> 

20				</li> 

21			</#list>  

22		</#if> 

23    </ul> 

24</div>