Post type get short code with category slug

function popular_collection_loop($atts)

{
    ob_start();
    extract( shortcode_atts( array(
            'category' => ''
             
    ), $atts ) );
        
    //var_dump($atts['category']);
    
    $arg = array(
    	'post_type' => 'popular_collection',
    	'posts_per_page' => -1,
        'tax_query' => array(
            array(
                'taxonomy' => 'popular_collection_category',
                'terms' => $atts['category'],
                'field' => 'slug',
            )
        )
     );
     
    // echo '<pre>';
    // print_r($arg);
    
    $popular_collectionPost = new WP_Query($arg);
            
	?>
	<div id="mainpopular_collection">
    	<?php if ($popular_collectionPost->have_posts()) : ?>
    			<?php while ($popular_collectionPost->have_posts()) : ?>
    			        <?php $popular_collectionPost->the_post(); ?>
    			        
    			<?php endwhile; ?>
        <?php endif; ?>
    </div>

<?php
	wp_reset_postdata();
	
    $myvar = ob_get_clean();
                return $myvar;
    }
add_shortcode('popular_collection_gird', 'popular_collection_loop');