Ok, this is a good error to debug, and I know exactly what's wrong: Did you install docker with Ubuntu or with YAMS?
If you installed it with Ubuntu, then you installed the Snap version which will not work with YAMS. Snaps run in a sandbox mode and don't have privileged access to the OS. The fix for this is to uninstall the Snap version of docker and install the one that comes with YAMS.
If you prefer to install Ubuntu server from zero, make sure not to install Docker with the installer. It doesn't work with YAMS 
Hi,
Thanks again for taking the time to reply and point me in the right direction. I have uninstalled any trace of docker and docker compose, but the installer still reports them as being there. Is there something else I can do except reinstalling the whole ubuntu OS?
Checking prerequisites...
docker exists 
docker-compose exists
Run this and send the output here:
Code: Select all
which docker
which docker-composeroot@TC-Radu:~# which docker
/snap/bin/docker
root@TC-Radu:~# which docker-compose
/snap/bin/docker-compose
Yep, you haven't uninstalled docker. You still have the snap versions installed. You need to uninstall those versions before you can continue installing YAMS.
What else should I do?
sudo apt-get remove docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin docker-compose docker-compose-v2
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
Package 'docker-compose' is not installed, so not removed
Package 'docker-compose-v2' is not installed, so not removed
Package 'containerd.io' is not installed, so not removed
Package 'docker-buildx-plugin' is not installed, so not removed
Package 'docker-ce-cli' is not installed, so not removed
Package 'docker-ce' is not installed, so not removed
Package 'docker-compose-plugin' is not installed, so not removed
0 upgraded, 0 newly installed, 0 to remove and 5 not upgraded.
You are not using the right package manager (apt). You need to remove the snap version.
Check this: https://itsfoss.com/remove-snap/
Many thanks from an old systems engineer... 25 years ago, Linux was way less complicated... no snaps back then...
Yeah, I know your pain... Snaps sucks That's one of the main reasons I don't use Ubuntu, they install a lot of stupid unnecessary crap on top of the OS