Fatal error: Uncaught Error: Class "Illuminate\Database\Migrations\Migration" not found in C:\xampp\htdocs\database\migrations\2020_03_31_201107_add_is_double_upload_to_groups_table.php:21 Stack trace: #0 {main} thrown in C:\xampp\htdocs\database\migrations\2020_03_31_201107_add_is_double_upload_to_groups_table.php on line 21