This one's really odd. I just tried to connect to my 8.3.20 OfficePC using VRP (1.1.2 Build 83) for the first time in a couple months, and it won't connect -- just keeps throwing the error at me. If I plug a monitor and keyboard directly into the OPC, everything's fine. This OPC has been untouched since the last time I successfully used VRP with it, and I'm using the same laptop with the same install of VRP that worked before. I even tried installing VRP onto another laptop entirely, and got the same result.
WorkVisual, OTOH, has no issues connecting to this OPC from either laptop. I'm really quite puzzled as to why it would have quit. I could see it if I'd made changes somewhere, but nothing's been changed.