New info: i figured that duckdns add-on stopped. After starting it I get the following error:
ERROR: Problem connecting to server (get for https://acme-v02.api.letsencrypt.org/directory; curl returned with 6)
EXPECTED value GOT EOF
INFO: Service duckdns exited with code 1 (by signal 0)
I set up HA a long time ago and I use x.duckdns.org:8123 for internal and external address as well to access my HA instance. A few days ago it got unaccessible on this address. I could log in with https://homeassistant.local:8123/ but HA says no internet connection. Below wording:
Failed to perform the action update/install. Error updating Home Assistant Core ‘HomeAssistantCore.update’ blocked from execution, no host internet connection
Can you please help me what can I try to resolve this?