Fatal error: Uncaught Error: Call to undefined function WC() in /srv/users/wakum/apps/wakum/public/wp-content/plugins/wt-smart-coupons-for-woocommerce/public/modules/auto_coupon/auto_coupon.php:366 Stack trace: #0 /srv/users/wakum/apps/wakum/public/wp-includes/class-wp-hook.php(324): Wt_Smart_Coupon_Auto_Coupon_Public->auto_apply_coupons('') #1 /srv/users/wakum/apps/wakum/public/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(NULL, Array) #2 /srv/users/wakum/apps/wakum/public/wp-includes/plugin.php(517): WP_Hook->do_action(Array) #3 /srv/users/wakum/apps/wakum/public/wp-settings.php(717): do_action('wp_loaded') #4 /srv/users/wakum/apps/wakum/public/wp-config.php(88): require_once('/srv/users/waku...') #5 /srv/users/wakum/apps/wakum/public/wp-load.php(50): require_once('/srv/users/waku...') #6 /srv/users/wakum/apps/wakum/public/wp-blog-header.php(13): require_once('/srv/users/waku...') #7 /srv/users/wakum/apps/wakum/public/index.php(17): require('/srv/users/waku...') #8 {main} thrown in /srv/users/wakum/apps/wakum/public/wp-content/plugins/wt-smart-coupons-for-woocommerce/public/modules/auto_coupon/auto_coupon.php on line 366