Fatal error: Uncaught Error: Interface "Spatie\LaravelPdf\PostProcessing\PdfPostProcessor" not found in C:\xampp\htdocs\emailer2\vendor\spatie\laravel-pdf\src\PostProcessing\EncryptPdf.php:8 Stack trace: #0 {main} thrown in C:\xampp\htdocs\emailer2\vendor\spatie\laravel-pdf\src\PostProcessing\EncryptPdf.php on line 8