If you have just done a fresh install today, then you most likely have encountered the issue between the recent Docker 20.x update and HA Supervisor.
Try these steps.
sudo apt remove docker-ce
sudo apt autoremove --purge -y
sudo reboot
When the machine comes back online;
sudo apt install docker-ce=5:19.03.13~3-0~debian-buster
sudo reboot
If this is successful, do not do any OS updates until the Supervisor update comes through to address the Docker 20.x issue.
You may also need to re-run the installer script.
sudo -i
curl -sL "https://raw.githubusercontent.com/Kanga-Who/home-assistant/master/supervised-installer.sh" | bash -s