I\'m having this notice with all products on shop page after updating WooCommerce version to 3.0.
Notice: product_type was called incorrectly . Product properties sh
The product_type property is deprecated. Use get_type() to get internal type.
So you need to change this:
$product->product_type;
to this:
$product->get_type();
(in functions.php) tried editing the "Select Options" text in WooCommerce and it gave that error.
Rafawhs answer worked for me too. This: $product->get_type();