Home Assistant after modification

Installation
1

Hi, I state that I am a first-time user with Home Assistant.
I tried to search on some threads, on the forum, without finding what I needed, so here is my problem:
I have previously installed Hassos on a Virtual Box running on a notebook, 24/7.
Everything was working fine, until I installed the “Duck dns” addon, since then I haven’t been able to connect on HA.
Given my inexperience I tried to install a second Hassos, (always on VirtualBox), but even with a new session I have no way to connect (http://192.168.1.34.8123), if instead I do (192.168.1.134:4357 ), the following message appears:
Home Assistant observer
Supervisor: Connected
Supported: Supported
Healthy: Healthy

I would be very grateful to anyone who can help me.
Thank you

2

If you installed DuckDNS (and installed the included let’s encrypt certificates) you must use https not http.

3

Thanks for your answer
I also tried with https, but the server is not responding.
Then I did a new installation, I get the IP address, but I can’t connect to Home Assistant even for the first installation.