Fatal error: Uncaught Error: Class 'app\common\model\UserCoupon' not found in /www/wwwroot/0.vhai.com/1.vhai.com/feijin_shop/source/application/api/model/UserCoupon.php:13 Stack trace: #0 {main} thrown in /www/wwwroot/0.vhai.com/1.vhai.com/feijin_shop/source/application/api/model/UserCoupon.php on line 13