This seems like network connectivity issue. What are you entering in your connection dialogue for the server and port?
Also how are you starting Rserve?
I have the same problem as you, and I haven't found any solution. Have you fixed the problem in the meanwhile? If you help me, this would be really useful for me! Thanks, Nicolò
I had the same error message. Maybe the port is in use, ie port 53039 or port 6311 (from 127.0.0.1:533039 -> 127.0.0.1:6311).
I restarted my computer and tried again. This solved the problem.