A common cause of this error occurs when VisitorRego is set to launch automatically when Windows starts. After a computer starts, it can take several seconds for the Wi-Fi or Ethernet connection to fully establish. If VisitorRego launches before the connection is ready, it will not detect the VR Portal server and may display this error. In this situation, simply wait a moment for the network to become active, and click OK to continue. Once the connection is established, VisitorRego will function normally.