我已经用另一个代码找到了解决方案，但仍然不知道第一个代码的问题是什么。问题解决了。我将使用的代码是：

               <div class="card-deck">
               <?php 
               // the query  
               $wpb_all_query = new WP_Query(array(
                                  \'post_type\'=>\'grants\',
                                  \'scholarship_degree\'=> \'bachelor\',
                                  \'post_status\'=>\'publish\',
                                  \'posts_per_page\'=>  4,
                                  \'tax_query\' => array(array(
                                    \'taxonomy\' => \'expired\',
                                     \'field\'    => \'slug\',
                                     \'terms\'    => array( \'expired\' ),
                                     \'operator\' => \'NOT IN\',
                                    )),
                                )); 
            ?> 
            <?php if ( $wpb_all_query->have_posts() ) : ?>
                  <!-- the loop -->
               <div class="row">           
                    <?php while ( $wpb_all_query->have_posts() ) : $wpb_all_query->the_post(); ?>
                       <div class="col-sm-3" > 
                           <a href="<?php the_permalink(); ?>">
                             <div class="card">
                              <?php $url = wp_get_attachment_url( get_post_thumbnail_id($post->ID), \' \' ); ?>
                              <img  class="card-img-top" src="<?php echo $url ?>" /> 
                                  <div class="card-body">
                                    <p class="card-title"><?php the_title();?> </p>
                                         </a>
                                          <p class="card-text">
                                        <div class="text-muted">
                                    <p><?php $terms = wp_get_post_terms($post->ID, \'funding-scholarship\');
                                              if ($terms) {
                                              $out = array(
                                              \'name\'=>\' 
                                                  <svg class="bi bi-bookmark" width="1em" height="1em" viewBox="0 0 16 16"                                                                          fill="black"xmlns="http://www.w3.org/2000/svg">
                                                   <path fill-rule="evenodd" d="M8 12l5 3V3a2 2 0 00-2-2H5a2 2 0 00-2 2v12l5-3zm-4 1.234l4-2.4 4 2.4V3a1 1 0 00-1-1H5a1 1 0 00-1 1v10.234z" clip-rule="evenodd"/>
                                                  </svg> تمويل المنحة     \');
                                  foreach ($terms as $term) {
                                  $out[] = \'<a class="text-muted\' .$term->slug .\'" href="\' .get_term_link( $term->slug, \'funding-scholarship\') .\'">\' .$term->name .\'</a>\';}
                                   echo join( \', \', $out ); }?></small></p> 
                          </div>  
                      </div>  
                  </div>
               </div>  
                  <?php endwhile; ?>
                  <!-- end of the loop -->
                  <?php wp_reset_postdata(); ?>
                  <?php else : ?>
                  <p><?php _e( \'Sorry, no posts matched your criteria.\' ); ?></p> 
                  <?php endif; ?>  
                  </div>  
                  </div> 

          AND THE SHORTCODE WHICH I WILL USE :

          function my_bachelor_shortcode( $attr ) {
                       ob_start();
                       get_template_part(\'frontpage/section\', \'bachelorscholarships\');
                      return ob_get_clean();
          }
          add_shortcode( \'bachelorgrantslist\', \'my_bachelor_shortcode\' );