Server SSL certificate is not trusted

Help
1

Please fill out the fields below so we can help you better. Note: you must provide your domain name to get help. Domain names for issued certificates are all made public in Certificate Transparency logs (e.g. https://crt.sh/?q=example.com), so withholding your domain name here does not increase secrecy, but only makes it harder for us to provide help.

My domain is:
https:bergmans.duckdns.org

I ran this command:
Website Vulnerability Scanner. https://pentest-tools.com

It produced this output:
Server SSL certificate is not trusted
Hostname ‘104.158.246.149’ doesn’t match ‘bergmans.duckdns.org’

My web server is (include version):
Python/3.6

The operating system my web server runs on is (include version):
Linux Debian

My hosting provider, if applicable, is:

I can login to a root shell on my machine (yes or no, or I don’t know):
I don’t know

I’m using a control panel to manage my site (no, or provide the name and version of the control panel):
No

Just this week I lost access to my webserver for my home automation (Home Assistant)
I can login it local but not using my dns (https://bergmans.duckdns.org)
I’m very new to this. Is this some thing with my certificate?

2

Did you try to reassign your domainname to the ip address via your dyndns provider? The address behind the name bergmans.duckdns.org seems to be unreachable.

3

Like I say I’m new to this. How would I do that? I logged into duckdns site but I dont see anything to reassign my domainname.

4

Well, how did you do it initially? You have to update the ip address that is connected to your domain name, so please ask your dyndns provider first.

5

I did that. It says it is up to date and no changes made.

6

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