无法加载资源：服务器响应状态为404（未找到） - Wordpress

i use under code in my javascript but when i click add_new_item (class tag a) in console show me this error :

script: 1 Failed to load resource: the server responded with a status of 404 (Not Found)

<script src="text/script">
jQuery(document).ready(function ($) {

    $('.add_item_slider').on('click' , function (event) {
        event.preventDefault();
        var wrapper = $('.link-dl-wrapper');
        var item = '<p> 
           Slider image:
            <input type="text" name="product_slider[]" style="width: 80%; direction:ltr;">
            <a href="#"><span class="dashicons dashicons-no"></span></a>

            </p>';
            wrapper.append(item);
    })
})
</script>

<a href="#" class="add_item_slider">Add new item slider image</a>
<div class="slider_wrapper">
    <p>
        Slider image:
        <input type="text" name="product_slider[]" style="width: 80%; direction:ltr;">
        <a href="#"><span class="dashicons dashicons-no"></span></a>
    </p>
</div>