Fatal error: Uncaught Error: Class "Illuminate\Support\ServiceProvider" not found in C:\xampp\htdocs\vendor\webklex\laravel-pdfmerger\src\PDFMerger\Providers\PDFMergerServiceProvider.php:18 Stack trace: #0 {main} thrown in C:\xampp\htdocs\vendor\webklex\laravel-pdfmerger\src\PDFMerger\Providers\PDFMergerServiceProvider.php on line 18