Issues with running script for k3s


I’m trying to run k3s installation script on Ubuntu 18.04 (described here: Rancher Docs: Installation) and I cannot see docker images when script is done, although install script ( as described in linked instructions) executes successfully and binary is downloaded.

If I try some docker command after the installation I get:

#docker save -o pause.img
Error response from daemon: No such image:

Do you know what could be the issue?