I'm finally seeing toots that have been posted more recently. I think the biggest issue around doing a root cause analysis is that I do not know where to look to see why the problem happened in the first place. My best guess is that I let my SSL cert expire and it took a while for everything to get set right after I got certbot to refresh my cert. Oh well. Glad it's working again.
Personal Mastodon to see what's up with federated social networks.