@Retired_mod thanks for you response.

• I am not running through a proxy. At least, not on purpose. How do I know if I am running through a proxy? And where can I find the values of <proxy_url> and <port> so that I can try restarting my VSCode.
• I have tried the latest release version 1.3 and downgraded to 1.2.7. Both give the same error.
• I have uninstalled and reinstalled the extension a few times. However, I see that my previous extension configuration is still showing the same Workspace, Cluster and Sync Destination even after I uninstalled and installed it again.