"port out of range" error on Digi connect Wi-sp using the real port driver

I have setup a network that was working with 3 Digi connect wi-SP units. However, no the PC cannot interface with the serial port and in a terminal I just get “port out of range” repeated four times each time I try to connect to the realport on socket 771. reboots of both the devices and PC do not correct the issue. Any ideas to what is causing this error?

Is it possible some sort of firewall/antivirus is blocking access to the 771 port for the driver?

It could be possible, but the configurations was working for a day and then stopped. I am guessing there is an issue with the realport driver somehow. Still have not found a fix.