custom post array issues

I’m trying to update a custom post array for wordpress and running into errors. I’m a novice with PHP so apologize if this is a simple fix. Here’s the original code:

<?php 
					$homespecials = get_posts('post_type=button-ads&posts_per_page=3');
					foreach($homespecials as $homespecial){
						//print_r($homespecial);
						$image = wp_get_attachment_image_src( get_post_thumbnail_id( $homespecial->ID ), 'full');
						$link = get_field('link', $homespecial->ID);
						$count++;
						if($count==1){
							$style="width: 32%; padding-right: 1%;";
						} elseif($count==2){
							$style="padding:0 0.5%; width:32%;";
						} elseif($count==3){
							$style="width: 32%; padding-left: 1%;";
						}
						?>
<a href="<?php echo $link; ?>"><img class="size-full alignleft" alt="<?php echo $homespecial->post_name; ?>" src="<?php echo $image[0]; ?>" width="415" height="204" /></a>
					<?php } ?>

And here’s what’s in the functions.php file:

unction create_posttype() {
  
    register_post_type( 'button-ads',
    // CPT Options
        array(
            'labels' => array(
                'name' => __( 'Button Ads' ),
                'singular_name' => __( 'Button Ad' )
            ),
            'public' => true,
            'has_archive' => true,
            'rewrite' => array('slug' => 'button-ads'),
            'show_in_rest' => true,
  'supports'=>array('title', 'thumbnail')
        )
    );
}
// Hooking up our function to theme setup
add_action( 'init', 'create_posttype' );

When the top code is in the sidebar, I’m getting errors. I was able to grab a post array script from another site component that worked and modified it as such:

<?php $homespecials = get_posts('post_type=button-ads&numberposts=3');
foreach ($homespecials as $homespecial) :
setup_postdata($homespecial);
    $image = wp_get_attachment_image_src( get_post_thumbnail_id( $homespecial->ID ), 'full');
						$link = get_field('link', $homespecial->ID);
    ?>
  
    
<li><a href="<?php echo $link; ?>"><img class="size-full alignleft" alt="<?php echo $homespecial->post_name; ?>" src="<?php echo $image[0]; ?>" width="415" height="204" /></a><a href="<?php echo $link; ?>"><img class="size-full alignleft" alt="" src="<?php echo $image[0]; ?>" width="415" height="204" /></a>
</li>
<?php endforeach; ?>

However, the thumbnail image from the array isn’t populating. Any idea where my problem is? I’m wanting to display the featured image for the post and there’s a custom field to include the hyperlink