RDP over Access

Following the guide here: Cloudflare Access now supports RDP but hitting an error when running the example command from the client machine. The “server” machine connected just fine.

$ Cloudflared access rdp --hostname rdp.example.com --url rdp://localhost:3389

ERRO[0000] Error validating origin URL
error=“Currently Cloudflare Tunnel does not support rdp protocol.”

Is there a newer version of Cloudflared that does support rdp? Currently running “Cloudflared version 2019.2.0 (built 2019-02-11-2011 UTC)”.