No idea what changed, I assume an addon updated but dashboards and the web interface are no longer loading. My ESPhome devices appear to be working. I can access the ha command line locally on the machine but i’m not sure where to begin diagnosing the issue. Any help would be appreciated!
This seems like it could be a problem with DuckDNS/Let’sEncrypt. I can access my HA control panels and dashboards via the IP without SSL. Trying to figure it out…
Your Home Assistant URL is pointing to the wrong port 
443 is the port for https, but homeassistant should be running on port 8123. I don’t know how long you’ve had it set up this way, but using port 443 for HA is an extremely bad idea. It means all internet traffic coming into your house is hitting your HA instance directly.