I moved to a new Pi and couldn’t get the old domain working so created a new one, the DuckDNS log looks OK:
# INFO: Using main config file /data/workdir/config
Processing XXXX.duckdns.org
+ Signing domains...
+ Generating private key...
+ Generating signing request...
+ Requesting new certificate order from CA...
+ Received 1 authorizations URLs from the CA
+ Handling authorization for XXXX.duckdns.org
+ 1 pending challenge(s)
+ Deploying challenge tokens...
OK + Responding to challenge for XXXX.duckdns.org authorization...
+ Challenge is valid!
+ Cleaning challenge tokens...
OK + Requesting certificate...
Warning: Will read cert request from stdin since no -in option is given
+ Checking certificate...
+ Done!
+ Creating fullchain.pem...
+ Done!
And no errors in NGINX Home Assistant SSL proxy. I have Restarted.
Also, I can only get local IP working in Chrome and Edge, for firefox, I just get HA logo and eventually, it times out.
When I go to the domain it times out. It worked OK before. Any ideas?