Fatal error: Uncaught Error: Class 'Illuminate\Database\Migrations\Migration' not found in C:\laragon\www\test\database\migrations\2020_02_18_150526_alter_users_add_is_online.php:7 Stack trace: #0 {main} thrown in C:\laragon\www\test\database\migrations\2020_02_18_150526_alter_users_add_is_online.php on line 7