When I open the preview portal (via the launch tab) as of 2021-9-9 (runtime version 2.12.2), it just continues to display the loading spinner forever. I've seen a couple topics in the forums regarding similar issues after this update, but no recent Bug reports. Strangely, this bug only occurs on 2 apps (the others seem to work fine.) Please try to resolve this soon, as this is impacting our develepment. The main app this is impacting is: 205146