Set slider images in data-bgslider=”images/1.jpg|images/2.jpg….” attribute as display in below example code. Do not put blank space between image path string.
<section class="intro-section">
<div class="container">
...
</div>
<!-- Background slider -->
<div class="bg-section full-wh">
<div class="bgslider" data-bgslider="images/medical_01.jpg|images/medical_02.jpg|images/medical_03.jpg|images/medical_04.jpg|images/medical_05.jpg"></div>
</div>
<!-- Background slider -->
<b class="full-wh overlay"></b>
</section>