Just to help you out Sweet Homes,
This problem occurs on servers where PHP “Notice” warnings are turned on. There are two lines with an error in woo-commerce-price-by-country.php (line 949 and line 959), and this screws up the AJAX response. There’s two ways to fix this.
1. Turn off Notice warnings on your server/PHP settings
2.
Change line 949 to
if (isset($_COOKIE[‘country’])) { $country = $_COOKIE[‘country’]; } else { $country = “”; }
Change line 969 to
if (!isset($inList)) { $inList = “no”; }
Good luck. I managed to get it working!