I'm having the same problem. EyeTV 4 (4.0.0 (8526)) on a 2018 Mac Mini, OS 10.15.7. Exact same situation as tvparty2night outlined above. Tuning works fine, no channels and no programming listed in Program Guide, no OTA Broadcast option available. EPG subscription up to date. Can still watch channels listed in the "All Channels" panel. Just started today.
Geniatech, what's going on? I know many others are having this same issue.