I have a Dreambox DM900 with Newnigma2 and I also get an error while trying to update from 1.19 to 1.20 with vavoo:
wget: error getting response: Network is unreachable
When I try to update with telnet, I also get an error:
root@dm900:~$ cd /tmp
root@dm900:/tmp$ wget --no-check-certificate 'https://github.com/Belfagor2005/vavoo/archive/refs/heads/main.tar.gz'
Connecting to github.com (140.82.121.3:443)
wget: error getting response
