Magento 2: \Magento\Sales\Model\OrderRepository is not working in observer

Question

$orderId = $order->getId();
                     $objectManager = $this->dataHelper->getObjectManager();
                     $order12 = $objectManager->create('\Magento\Sales\Model\OrderRepository')->get($orderId);

This code is not working in the observer. I am sending data through rest API. Getting issue in the console:

Failed to load resource: the server responded with a status of 500 (Internal Server Error)

Can you please provide the solution?

Thanks

Answer 1

Try

$order12 = $objectManager->create('Magento\Sales\Api\OrderRepositoryInterface')->get($orderId);

OR

$order12 = $objectManager->create('Magento\Sales\Model\Order')->load($orderId);