Loading indicator stuck on launch

Hi, I just installed this app and on the first launch, after signing in with GitHub, the app merely sits with a spinning loading indicator and never comes out of it. Nothing else in the app is clickable. I’ve rebooted, reinstalled the app, but I get the same behavior every time. Any ideas?

Running macOS 11.4 on an M1 MacBook Air.

Are you behind a firewall or a VPN that maybe blocks traffic to Google services?

Not that I know of. I’m staying with someone right now so it’s possible there’s something on their router that’s blocking something, but I haven’t had any issues with anything else. It’s not particularly urgent for me so I can try again once I get home and back on my own network.