I just upgraded to macOS 26.3 Tahoe from an older macOS version. Now whenever I launch Arena from the Epic Games app, it gets stuck on the loading screen. I can hear the sounds that MTGA makes when you arrive on the main home screen. Then I get bounced out of my account on my mac back to a login screen. I have to log in again. When I do, the MTGA app appears to not be open - it doesn't show up on the Dock or in Force quit. However, the background music is playing! When I use 'top' in a Terminal, the MTGA process is running. I have to manually kill this process.

MTGA is now completely unusable on macOS 26.3 Tahoe. My computer is a 2020 MacBook Pro Intel Core i7.

I've attached log files from three attempts to run Arena this evening.