Answers for "target class [moviescontroller::class] does not exist."

Target class [Controller] does not exist.

//accessing any function in the controller (this is web.php file)
use App\Http\Controllers\PostsController;

Route::get('/post', 'App\Http\Controllers\PostsController@index');

Target class does not exist.

use App\Http\Controllers\RegistrationController;

Route::get('/', [RegistrationController::class, 'create']);