Docker run not finding file

Hi, we are very new to Docker and we are trying to run a trial product named H20ai. We have followed the instructions in the URL below and it requests to make a directory named dai_rel_X.Y.Z (where x.y.z is the version we are running). Then the only thing we found we had to change was run all commands from username\dai_rel_X.Y.Z instead of just username. All ran okay except the last part - stage 10, where the “docker run” command kept providing the error stating “unable to find opsh2oai/h2oai-runtime:latest locally”.

What are we doing wrong please. Thanks in advance