Lightsail instance inaccessible.

I was working on building something in FastAPI, dinking around with changing responses, when I got disconnected. Since then, the server has been completely inaccessible, and I have no idea why. It doesn't respond to ping, cant connect through SSH, nothing. I've rebooted, stopped/started, and it's like it's there but dead.

Metrics just shows it idling, and I was able to take a snapshot, but I'm not sure what I can even do with the snapshot. I've checked other posts, and I don't really have any idea what went wrong. I wasn't messing around with the firewall or anything that should have blocked my access.