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Slideshow on scrolling the page overlapping navbar

i am making website on event management, i need to include a slideshow in different pages, but that slideshow is overlapping the sticky navbar and making it not responsive, can any one tell whta the reason behind this? i can’t share the link because its not online yet, the container of slide show is on relative, if i change the value its position changes or it completly disappeared please tell me the solution

Here is my site Read-Only: LINK
(how to share your site Read-Only link)