Fatal error: Uncaught Error: Class 'app\models\BitrixCrm\EntityService\BaseService' not found in /var/www/up.arbitr-dolg.ru/models/BitrixCrm/EntityService/Crm/ProductSections.php:8 Stack trace: #0 {main} thrown in /var/www/up.arbitr-dolg.ru/models/BitrixCrm/EntityService/Crm/ProductSections.php on line 8