Check Subscription Registration: Ensure your subscription is fully registered, as it may take some time to complete.
Virtual Machine Size and Type: Verify the chosen virtual machine size (e.g., standard_DS11_v2) aligns with your subscription and resource availability.
Dependencies and Workspace Details: Ensure all workspace dependencies are configured correctly. and consider creating a Compute Cluster instead of a Compute Instance.
Migration Hotfix: A recent migration hotfix may take some time to affect your subscription. Wait and retry.