Can't SSH to Amazon Lightsail server using browser-based client

I've been able to use the browser-based SSH client without any issues until today. Now, I'm getting the following error each time I try to connect. I've tried restarting, stopping/starting, and removing/adding back the static IP.

CONNECTION ERROR An error occurred and we were unable to connect or stay connected to your instance. If this instance has just started up, try again in a minute or two.

Here is a screenshot:

The issue was I enabled the ufw firewall on Ubuntu and closed my SSH session. Naturally, I was unable to SSH back in on port 22 since only ports 80 and 443 were allowed at that point.

For Lightsail, I don't think there's a way around it, unless a snapshot from one instance can be loaded onto another instance.

For AWS, you can unmount and put the volume on a new instance: https://forums.aws.amazon.com/thread.jspa?threadID=112384