Fatal error: Uncaught Error: Class 'CodeIgniter\Database\Migration' not found in C:\xampp\htdocs\enviarEmail\tests\_support\Database\Migrations\2020-02-22-222222_example_migration.php:7 Stack trace: #0 {main} thrown in C:\xampp\htdocs\enviarEmail\tests\_support\Database\Migrations\2020-02-22-222222_example_migration.php on line 7