I got exact same error message. Submitted ticket to Pegasus Astro and got the following response from George K: Go to Unity platform -> Information tab -> Channel info and check the Wi-Fi signal quality. If the signal is or falls below 40% a firmware update cannot be successfully performed. Also, is...

Update -- after reinstalling the newest Unity version and rebooting the NYX and Windows, problem was resolved -- NINA and PHD2 both connected the NYX 101 and functioned normally. Unfortunately, by that time clouds had moved in, so will have to wait for another clear night -- few and far between in S...

Updated to 1.9.1784.21 this evening and can no longer connect to NINA (or ASCOM for that matter). Help please.
Jon