Initial Update: Saturday, 5 March 2016 04:02 UTC
Starting approximately at 21:30 UTC on 03 March 2016, engineers are aware of an issue where a limited subset of customers may experience errors when they try to setup Continuous Deployment in Web Apps with Visual Studio Online Team Services via Classic Azure Management Portal. (https://manage.windowsazure.com).
Users are encouraged to use Visual Studio Team Services build definitions to setup continuous deployment for Azure Web Apps. Alternatively, users can use the Azure Portal (https://portal.azure.com) to setup continuous deployment when using Git repositories.
We are actively working to resolve this issue and apologize for any inconvenience.
Sincerely,
Manohar