Indigo 7.2.0 is
now available for download and has a new UI option to address this problem. It turns out that Viasat / Exede was blocking Indigo's request to establish the reflector connection, and didn't bother to publicly post that the port we happened to be using was one they were blocking (very much not appreciated).
There is now a new popup menu item in the Start Local Server dialog: try choosing
Alternative 1 from the
Outgoing reflector port selection control and your reflector should work.