I have the same problem. I also try to change the Time Out in IDE Option from 30 to 500, but the problem remain the same.
Does it related to new WiFi network ? I can test my app at my office, but when I arrive home, I got this error.
I see the errors in the server logs, they are related to a mismatch between the token ip address and the computer ip address. Have you tried to restart B4i?