Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in C:\xampp\htdocs\arthurkotsch.online\vendor\yiisoft\yii2-bootstrap5\tests\TestCase.php:15 Stack trace: #0 {main} thrown in C:\xampp\htdocs\arthurkotsch.online\vendor\yiisoft\yii2-bootstrap5\tests\TestCase.php on line 15