Azure App Service is a service used to create and deploy scalable, mission-critical web apps.
What specific error messages, if any, are you seeing when you try to enable the web app?
We haven’t heard from you on the last response in private message and was just checking back to see if you have a resolution yet.
Try to start the app by using the below CLI command and check once.
az webapp start --name AppName --resource-group RGName
Review your Subscription and billing accounts in the Cost Management + Billing. Make sure if you have any missed pay invoices in past (which might have disabled the subscription).
Check whether you have any notifications related to the App service disable status.
Let me know if you have any further assistances needed.