Attempted to load class "ClassUtils" from namespace "Doctrine\Common\Util".
Did you forget a "use" statement for another namespace?

class MainController extends AbstractController
{
    #[Route('/', name: 'app_main')]
    public function index(EntityManagerInterface $entity, Request $request): Response
    {
        $dataList = $entity->getRepository(Products::class)->findAll();
        $product = new Products();
        $form = $this->createForm(ProductsType::class, $product);
        $form->handleRequest($request);

        if($form->isSubmitted() && $form->isValid()){
            $entity->persist($product);
            $entity->flush();
        }
        return $this->render('main/index.html.twig', [
            'dataList' => $dataList,
            'form'=>$form->createView(),
        ]);
    }
}