Do you recall the type of Azure subscription that was used for deployment?
It looks like the WebApp is deleted. You may login to the Azure subscription that you used to provision the WebApp; check the status of the WebApp and review the state of the subscription.
If it's Azure for Students subscription - Your Azure for Students subscription might get disabled because you've used all of your credit, your credit has expired, or you've accidentally canceled your subscription. See what issue applies to you and learn how you can get your subscription reactivated.
Also, checkout How to restore a deleted Azure Web App