Function creates error after update

Hello,
since the latest update, the following function no longer works and creates empty single product pages.

function bt_woocommerce_overview_banner_image()
{
global $avia_config;
if(avia_is_dynamic_template() || is_paged() || is_search() ) return false;

$image_size = “entry_with_sidebar”;
$layout = avia_layout_class( ‘main’ , false );
if($layout == ‘fullsize’) $image_size = ‘entry_without_sidebar’;

if(is_shop())
{
$shop_id = function_exists( ‘wc_get_page_id’ ) ? wc_get_page_id( ‘shop’ ) : woocommerce_get_page_id( ‘shop’ );
if($shop_id != -1)
{
$image = get_the_post_thumbnail($shop_id, $image_size);
if($image) echo “<div class=’page-thumb’>{$image}</div>”;
}
}

if(is_product_category())
{
global $wp_query;
$image = “”;
if(isset($wp_query->query_vars[‘taxonomy’]))
{
$term = get_term_by( ‘slug’, get_query_var($wp_query->query_vars[‘taxonomy’]), $wp_query->query_vars[‘taxonomy’]);

if(!empty($term->term_id))
{
$attachment_id = get_woocommerce_term_meta($term->term_id, ‘thumbnail_id’);
$style = get_woocommerce_term_meta($term->term_id, ‘av_cat_styling’);

if(!empty($attachment_id) && empty($style))
{
$image = wp_get_attachment_image( $attachment_id, ‘full’, false, array(‘class’=>’category_thumb’));
if($image) echo “{$image}”;
}

}
}
}

}

What can we use instead of this function?
Many greetings