HI @Abe Ungar ,
you could try az upgrade
in a PowerShell session (not an Azure CLI session). Here this worked without any issues.
If this is not working install the Azure CLI this way: https://learn.microsoft.com/en-us/cli/azure/install-azure-cli-windows?tabs=azure-cli
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(If the reply was helpful please don't forget to upvote and/or accept as answer, thank you)
Regards
Andreas Baumgarten