Hi Robbie,
We're sorry to hear you're having issues connecting your NFC reader. For scenarios like this, since the hardware is being detected by Windows and not by the software app, one of the suggestions we would like you to do is to try to uninstall the software and re-install it with the device plugged in your Surface Go.
Normally error messages like this happen because the software needs to be configured with the actual device plugged in. Another way to check, if you have another PC where you can insert the NFC reader and see if the other hardware can detect it and use the same functions.
If the issue would still persist after uninstalling and reinstalling the software, please reply back to this thread so we could further provide you with other steps to resolve this.