[Flatsome] - PHP error: Trying to access array offset on value of type null in...

Overview of the issue

When using Flatsome theme with WooCommerce Multilingual, you may encounter a PHP error when you disable the Show home link in breadcrumb option (Appearance → Customize → WooCommerce → Product Catalog).

Trying to access array offset on value of type null in .../wp-content/plugins/woocommerce-multilingual/inc/class-wcml-wc-strings.php on line 423

Workaround

Please, make sure of having a full backup of your site before proceeding.

• Open wp-content …/plugins/woocommerce-multilingual/inc/class-wcml-wc-strings.php file.
• Look for line 243.
• Replace:

  if ( $breadcrumbs[1][1] != get_post_type_archive_link( 'product' ) ) {
  

• With:

  if ( isset($breadcrumbs[1][1]) && $breadcrumbs[1][1] != get_post_type_archive_link( 'product' ) ) {