Hi,

First, update your theme to the latest version and then try to add the following code snippet to the Custom CSS area in Theme Settings to fix this issue.

.ult-carousel-wrapper .slick-prev,
.ult-carousel-wrapper .slick-next {
	position: absolute;
	background-color: transparent;
	padding: 0;

}

.ult-carousel-wrapper .slick-prev i,
.ult-carousel-wrapper .slick-next i {
	margin: 0;
}

.ult-carousel-wrapper .slick-prev:hover,
.ult-carousel-wrapper .slick-next:hover,
.ult-carousel-wrapper .slick-prev:focus,
.ult-carousel-wrapper .slick-next:focus,
.ult-carousel-wrapper .slick-dots > li i:hover {
	box-shadow: none;
	-webkit-box-shadow: none;
}

.ult-carousel-wrapper .slick-dots > li i {
	background-color: transparent;
	padding: 0;
}

Regards