I've experienced this problem when I create a Web App: "Oops! Could not create a Web App Something went wrong while creating Web App." What's that "something"? I have no clue.
Similarly, I couldn't create a VM. When I try to create a VM, it shows this (please see the screenshot) even though Is it due to an Azure outage or any problem at my end? It happens when I directly start creating from the "Virtual Machines" button from the Azure portal. At the same time, when I create a VM in a resource group it goes smoothly.
Any help will be greatly appreciated.