AWS Workspaces: Web access to Linux Workspaces (not supported)

If you attempt to access an AWS Workspace running Linux via a browser, you’ll get his spinner for what seems like a couple of minutes:

Eventually it times out with this error:

Looking in the docs here this is this note:

Web access to Linux WorkSpaces is currently not supported. Would be nice if it gave you an error when to attempt to logon to tell you it’s not a supported option instead of just falling.