Try to add the following PHP code snippet to the child theme functions.php file to fix this
function basel_category_thumb_double_size( $category ) {
global $basel_loop;
$small_thumbnail_size = apply_filters( 'subcategory_archive_thumbnail_size', 'woocommerce_thumbnail' );
$dimensions = wc_get_image_size( $small_thumbnail_size );
$thumbnail_id = get_woocommerce_term_meta( $category->term_id, 'thumbnail_id', true );
$attr_height = '';
if( ! empty( $basel_loop['double_size'] ) && $basel_loop['double_size'] ) {
$small_thumbnail_size = 'shop_catalog_x2';
$dimensions['width'] *= 2;
if ( $dimensions['height'] ) {
$dimensions['height'] *= 2;
$attr_height = 'height="' . esc_attr( $dimensions['height'] ) . '"';
}
}
if ( $thumbnail_id ) {
$image = wp_get_attachment_image_src( $thumbnail_id, $small_thumbnail_size );
$image = $image[0];
} else {
$image = wc_placeholder_img_src();
}
if ( $image ) {
// Prevent esc_url from breaking spaces in urls for image embeds
// Ref: https://core.trac.wordpress.org/ticket/23605
$image = str_replace( ' ', '%20', $image );
echo '<img src="' . esc_url( $image ) . '" alt="' . esc_attr( $category->name ) . '" width="' . esc_attr( $dimensions['width'] ) . '" ' . $attr_height . ' />';
}
}
.
