Did you check the troubleshooting steps for this? - https://learn.microsoft.com/en-us/azure/cloud-shell/troubleshooting
- Details: When using an Azure Active Directory subscription, you can't create storage.
- Resolution: Use an Azure subscription capable of creating storage resources. Azure AD subscriptions aren't able to create Azure resources
Did you tried any other browser and also try in incognito mode, I know sounds crazy but pop up blockers and settings locks down the configuration of Portal view.
Hope this helps.
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