Fatal error: Uncaught Error: Class "Illuminate\Support\Collection" not found in /home/defenders/public_html/0255_projects/pharmacy_sys/vendor/maatwebsite/excel/src/Columns/ColumnCollection.php:22 Stack trace: #0 {main} thrown in /home/defenders/public_html/0255_projects/pharmacy_sys/vendor/maatwebsite/excel/src/Columns/ColumnCollection.php on line 22