az ml : 'ml' is misspelled or not recognized by the system

I’m trying to update a model that was deployed with az ml. When I run any command starting with az ml (e.g. az ml -h) I now get the error:

Error loading command module ‘network’: No module named ‘azure.core.rest’ cannot import name ‘ARMChallengeAuthenticationPolicy’ ‘ml’ is misspelled or not recognized by the system.

Examples from AI knowledge base: az extension add --name anextension Add extension by name

az extension list-available List all publicly available extensions

https://docs.microsoft.com/en-US/cli/azure/extension#az_extension_add

I am using the following versions: az version

{ “azure-cli”: “2.33.1”, “azure-cli-core”: “2.33.1”, “azure-cli-telemetry”: “1.0.6”, “extensions”: { “ml”: “2.1.2” } }

az extension list

[ { “experimental”: false, “extensionType”: “whl”, “name”: “ml”, “path”: “/opt/az/extensions/ml”, “preview”: true, “version”: “2.1.2” } ]