Install virtualmin is not possible !

After a apt-get update && apt-get upgrade with no problem
wget http://software.virtualmin.com/gpl/scripts/install.sh
chmod +x install.sh
./install.sh

Installing extra dependencies for Debian 8 [ :heavy_check_mark: ]
Downloading apt.gpg [ERROR] Failed with error: 6
[ ✘ ]
[ERROR] Something went wrong. Exiting.
[ERROR] The last few log entries were:
Unpacking apt-transport-https (1.0.9.8.4) …
Preparing to unpack …/ca-certificates_20141019+deb8u4_all.deb …
Unpacking ca-certificates (20141019+deb8u4) over (20141019) …
Processing triggers for man-db (2.7.0.2-5) …
Setting up apt-transport-https (1.0.9.8.4) …
Setting up ca-certificates (20141019+deb8u4) …
Updating certificates in /etc/ssl/certs… 46 added, 67 removed; done.
Processing triggers for ca-certificates (20141019+deb8u4) …
Updating certificates in /etc/ssl/certs… 0 added, 0 removed; done.
Running hooks in /etc/ca-certificates/update.d…done.
Installing extra dependencies for Debian 8: Success.
Spin pid is: 8986
Downloading apt.gpg: [2018-12-03 18:32:24 CET] [ERROR] Failed with error: 6
[2018-12-03 18:32:24 CET] [ERROR] Something went wrong. Exiting.
[2018-12-03 18:32:24 CET] [ERROR] The last few log entries were:

Howdy,

Hmm, I don’t believe I’ve seen that before, though some Googling suggests that error may be a DNS resolution issue.

What is the output of these commands:

cat /etc/resolv.conf host software.virtualmin.com

root@srv01 ~]# cat /etc/resolv.conf
domain home
search home
nameserver 192.168.1.254


root@srv01 ~]# host software.virtualmin.com
software.virtualmin.com has address 163.172.162.254
software.virtualmin.com has address 149.28.242.101

I specify that it is a virtual machine installed from cloudmin!