THE EROR SHOWS AS WHILE TESTING DEPENDENCY INJECTION
Failed to instantiate component or class “\app\components\First”.
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Caused by: ReflectionException
Class \app\components\First does not exist
in D:\xampp\htdocs\yii\newbasic\vendor\yiisoft\yii2\di\Container.php at line 447
WITH RESPECT TO ROOT , where is the location for component folder .? Are they under vendor subfolder ?