On the Mac, in System Settings, then General, then Software Update, I clicked yes to Beta Updates. I had already upgraded to Sonoma not knowing about this QB 2019 issue, so I have been stuck the last 2 weeks. I figured I could try to see if the Beta would get me back in business, and it did. If you haven't upgraded to Sonoma already, I would hold off and wait for this Beta release to become the actual next Sonoma release.