Fatal error: Uncaught Error: Call to undefined function __() in /var/www/html1/wp-content/plugins/salon-booking-system/src/SLB_Discount/Enum/DiscountType.php:28 Stack trace: #0 /var/www/html1/wp-content/plugins/salon-booking-system/src/SLB_Discount/Enum/DiscountType.php(34): SLB_Discount_Enum_DiscountType::init() #1 {main} thrown in /var/www/html1/wp-content/plugins/salon-booking-system/src/SLB_Discount/Enum/DiscountType.php on line 28