更改WordPress主题后，REST API不起作用

RESTAPI与默认主题2616完美配合，但当我更改主题时，网站上的帖子不会出现。有人有确切的问题吗？

<script type="text/javascript">
$(document).ready(function () {
    $.ajax({
        type: \'GET\',
        url: \'https://mywebsite.com/blog/wp-json/wp/v2/posts?_embed&per_page=3\',            

        success: function (data) {
            var posts_html = \'\';
            $.each(data, function (index, post) {
              //posts_html += \'<a href="\' + post.link + \'"><h2>\' + post.title.rendered + \'</h2></a>\';
              //posts_html += \'<p>\' + post.excerpt.rendered + \'</p>\';
              posts_html += \'<div class="blogpost">\';
              posts_html += \'<div class="post-item">\'
              posts_html += \'<div class="post-item-image">\';
              posts_html += \'<a href="\' + post.source_url + \'"></a>\';
              posts_html += \'<img src="\' + post.images.large + \'" alt="\'+ post.title.rendered + \'"</div>\';
              posts_html += \'<div class="post-item-header">\';
              posts_html += \'<span class="date">\' + moment(post.date).format("Do MMM YY") + \'</span>\';
              posts_html += \'<span class="user">\';
              posts_html += \'<a href="\' + post.link +\'">\';
              posts_html += \'<img src="https://mywebsite.com/img/p2plogo.png" alt="P2Pbench logo" >P2Pbench</a></span></div>\';
              posts_html += \'<div class="post-item-body">\';
              posts_html += \'<a href="\' + post.link + \'" style="text-decoration: underline;"> \'+ post.title.rendered + \'</a>\';
              posts_html += \'<div class="post-short-text"> \' + post.excerpt.rendered + \'</div></div></div></div></div>\';
            });
            $(\'#posts\').html(posts_html);
        },
        error: function (request, status, error) {
            alert(error);
        }
    });
});

HTML：

     <div class="blogs-post-list">
    <div id="posts">Loading posts...
   </div>
    </div>

function ws_register_images_field() { register_rest_field( \'post\', \'images\', array( \'get_callback\' => \'ws_get_images_urls\', \'update_callback\' => null, \'schema\' => null, ) ); } add_action( \'rest_api_init\', \'ws_register_images_field\' ); function ws_get_images_urls( $object, $field_name, $request ) { $medium = wp_get_attachment_image_src( get_post_thumbnail_id( $object->id ), \'medium\' ); $medium_url = $medium[\'0\']; $large = wp_get_attachment_image_src( get_post_thumbnail_id( $object->id ), \'large\' ); $large_url = $large[\'0\']; return array( \'medium\' => $medium_url, \'large\' => $large_url, ); }

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