Let´s Encrypt : HomeAssistant : Download failed

Hello there, letßs encrpt is running on mit Raspberry PI with HomeAssistant in Version 2023.1.4.
Since last Night i cant enter my Application on Iphone with my DuckDns-Account "my-domain".duckdns.org.

When i am running the let´s encrypt application on homeassistant the following message ist coming.

Certbot failed to authenticate some domains (authenticator: standalone). The Certificate Authority reported these problems:
Domain: mydomain.duckdns.org
Type: connection
Detail: Fetching http://mydomain.duckdns.org/.well-known/acme-challenge/OaKfI5Mmzf_Nd8Y9SLKIkiB_uj4ifVRFEhymetVBURg: Error getting validation data
Hint: The Certificate Authority failed to download the challenge files from the temporary standalone webserver started by Certbot on port 80. Ensure that the listed domains point to this machine and that it can accept inbound connections from the internet.
Some challenges have failed.

Yesterday everything was fine......today i have this issue. Can anybody help me?

The easiest way to use DuckDNS and Home Assistant is with the DuckDNS addon:

It includes a Let’s Encrypt client to get certificates automatically.


hi, thanks for your answer.
i try to configure the duckDNS Application on HomeAssistant. The next error is that the domain is not accepted after entering and confirming with "Enter". The browser is Chrome or Firefox. Everytime the same issue. If I then enter my token, the domain disappears again.i'm at a loss

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I'm not sure what the problem may be. Perhaps the Home Assistant community would be better able to help: https://community.home-assistant.io/


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