Hello Chris Ortiz,
Thank you for posting your query here!
This error "Ajax Extended call failed" message may not be specific to Azure itself but rather a general web development error. It suggests that there was a problem with making an asynchronous HTTP request, which might be related to the Azure portal's web interface or the code you are using to interact with Azure resources.
Can you try creating the same resource in an In-private browser window, and please ensure that you have registered the "Microsoft.Storage" resource and any other dependency resources.
And please ensure that you have a adequate RBAC permissions (Minimum Contributor) at subscription level. If the issue persists, please try to clear the browser cache and cookies and check.
Do let us know if you have any further queries. I’m happy to assist you further.
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