slide arrow is not showing up

I have a problem, I got a code from a video lesson and a jquery too, I'm using the two, I put the codes exactly as they were in the video, but anyway my arrow does not appear, it's like an A in it, I put an image to improve the visualization, how could I proceed? the jquery path is all right, java also, everything in the right folders and has been revised more than once, thank you who can help me, hug.

link

My slide html code:

h1 class="inicial"Adicionados Recentemente /h1 div class="carousel"
      div a href="#" img class="slide" src="img/01.png" alt="js" / /div /a
      div a href="#" img src="img/02.png" alt="java" / /div> /a

JavaScript code:

script
$('.carousel').slick({
  dots: true,
  infinite: true,
  speed: 500,
  slidesToShow: 4,
  slidesToScroll: 1,
});
/script

CSS Code:

/* Slider */
.slick-slider
{
    position: relative;

    display: block;
    box-sizing: border-box;

    -webkit-user-select: none;
       -moz-user-select: none;
        -ms-user-select: none;
            user-select: none;

    -webkit-touch-callout: none;
    -khtml-user-select: none;
    -ms-touch-action: pan-y;
        touch-action: pan-y;
    -webkit-tap-highlight-color: transparent;
}    
.slick-list
{
    position: relative;

    display: block;
    overflow: hidden;

    margin: 0;
    padding: 0;
}
.slick-list:focus
{
    outline: none;
}
.slick-list.dragging
{
    cursor: pointer;
    cursor: hand;
}

.slick-slider .slick-track,
.slick-slider .slick-list
{
    -webkit-transform: translate3d(0, 0, 0);
       -moz-transform: translate3d(0, 0, 0);
        -ms-transform: translate3d(0, 0, 0);
         -o-transform: translate3d(0, 0, 0);
            transform: translate3d(0, 0, 0);
}

.slick-track
{
    position: relative;
    top: 0;
    left: 0;

    display: block;
    margin-left: auto;
    margin-right: auto;
}
.slick-track:before,
.slick-track:after
{
    display: table;

    content: '';
}
.slick-track:after
{
    clear: both;
}
.slick-loading .slick-track
{
    visibility: hidden;
}

.slick-slide
{
    display: none;
    float: left;

    height: 100%;
    min-height: 1px;
}
[dir='rtl'] .slick-slide
{
    float: right;
}
.slick-slide img
{
    display: block;
}
.slick-slide.slick-loading img
{
    display: none;
}
.slick-slide.dragging img
{
    pointer-events: none;
}
.slick-initialized .slick-slide
{
    display: block;
}
.slick-loading .slick-slide
{
    visibility: hidden;
}
.slick-vertical .slick-slide
{
    display: block;

    height: auto;

    border: 1px solid transparent;
}
.slick-arrow.slick-hidden {
    display: none;
}