UPDATE 2023–03–18 This is the way to fix this: sudo apt remove containerd
sudo apt update
sudo apt install containerd.io -y
sudo rm /etc/containerd/config.toml — — — — — — — — — — — — — — — — — — — — — — — — — — As of 11 Jan 2023, Ubuntu 20 is broken for Kubernetes, because K8S 1.26 is not compatible with Containerd 1.5 (it needs 1.6). The workaround is to keep K8S from upgrading, and if it does, roll it back.