window snapping stopped working on just one of my Macs

I have an Air, MBP M1, and a iMac M1. All running latest Sonoma dev beta. All running latest BTT alpha. Window snapping still works on the laptops. But, snapping stopped working on the iMac. I've restarted multiple times. Is there anything else I should try?

Maybe it got disabled. There are two places to check:

Or the accessibility API doesn't work on that machine. To resolve that I'd recommend to remove BetterTouchTool from System Settings => Privacy & Security => Accessibility, then add it again manually