Fatal error: Uncaught Error: Undefined constant "WC_VERSION" in /data01/virt128112/domeenid/www.mixpack.ee/htdocs/wp-content/plugins/woocommerce-multiple-customer-addresses/classes/frontend/WCMCA_CheckoutPage.php:24 Stack trace: #0 /data01/virt128112/domeenid/www.mixpack.ee/htdocs/wp-includes/class-wp-hook.php(324): WCMCA_CheckoutPage->init('') #1 /data01/virt128112/domeenid/www.mixpack.ee/htdocs/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(NULL, Array) #2 /data01/virt128112/domeenid/www.mixpack.ee/htdocs/wp-includes/plugin.php(517): WP_Hook->do_action(Array) #3 /data01/virt128112/domeenid/www.mixpack.ee/htdocs/wp-settings.php(550): do_action('plugins_loaded') #4 /data01/virt128112/domeenid/www.mixpack.ee/htdocs/wp-config.php(88): require_once('/data01/virt128...') #5 /data01/virt128112/domeenid/www.mixpack.ee/htdocs/wp-load.php(50): require_once('/data01/virt128...') #6 /data01/virt128112/domeenid/www.mixpack.ee/htdocs/wp-blog-header.php(13): require_once('/data01/virt128...') #7 /data01/virt128112/domeenid/www.mixpack.ee/htdocs/index.php(17): require('/data01/virt128...') #8 {main} thrown in /data01/virt128112/domeenid/www.mixpack.ee/htdocs/wp-content/plugins/woocommerce-multiple-customer-addresses/classes/frontend/WCMCA_CheckoutPage.php on line 24