Fatal error: Uncaught Error: Interface "PhpOffice\PhpSpreadsheet\IComparable" not found in D:\xampp\htdocs\phpOffice\PhpSpreadsheet\Worksheet\Drawing\Shadow.php:8 Stack trace: #0 {main} thrown in D:\xampp\htdocs\phpOffice\PhpSpreadsheet\Worksheet\Drawing\Shadow.php on line 8