وفات بانوی با کرامت حضرت معصومه(س) تسلیت باد.

در حین انجام عملیات خطایی رخ داده است.
The following has evaluated to null or missing:
==> slidertitle.sliderimg.getAttribute("alt")  [in template "20098#20124#143517" at line 13, column 18]

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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: ${slidertitle.sliderimg.getAttribute(...  [in template "20098#20124#143517" at line 13, column 16]
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1<#assign 
2	liferay_theme = PortletJspTagLibs["/META-INF/liferay-theme.tld"] 
3	namespace = '_${randomNamespace}' 
4/> 
5 
6<@liferay_theme["defineObjects"] /> 
7<div class="sp-slider-uni owl-carousel owl-theme"> 
8    <#if slidertitle.getSiblings()?has_content>  
9    	<#list slidertitle.getSiblings() as cur_slidertitle>  
10      <div class="owl-slide d-flex align-items-center cover" style="background-image: url(${cur_slidertitle.sliderimg.getData()}"> 
11      <a href="${slidertitle.sliderlink.getData()}"> 
12        <div class="sp-caption">  
13            <p>${slidertitle.sliderimg.getAttribute("alt")}</p>  
14        </div> 
15        </a> 
16      </div><!--/owl-slide--> 
17        </#list>  
18    </#if> 
19</div> 
20 
21<script> 
22 
23	var dir=$("html").attr("dir"); 
24    if(dir=="rtl") 
25        lang=true; 
26    else  
27        lang=false; 
28     
29    const $owlCarousel = $(".sp-slider-uni.owl-carousel").owlCarousel({ 
30      rtl:lang, 
31      items: 1, 
32      mouseDrag:false 
33    }); 
34 
35 
36</script>