Fatal error: Uncaught Error: Class "Illuminate\Support\Collection" not found in /home/slsiluser/public_html/service-portal/vendor/rap2hpoutre/fast-excel/src/SheetCollection.php:7 Stack trace: #0 {main} thrown in /home/slsiluser/public_html/service-portal/vendor/rap2hpoutre/fast-excel/src/SheetCollection.php on line 7