Fatal error: Uncaught Error: Class "think\Facade" not found in C:\xampp\htdocs\HeTongSite\vendor\topthink\framework\src\think\facade\Lang.php:30 Stack trace: #0 {main} thrown in C:\xampp\htdocs\HeTongSite\vendor\topthink\framework\src\think\facade\Lang.php on line 30