The error you are seeing is related to a change in the name of the rock-on we had a little while ago (my doing), but all you need to do is to uninstall and re-install the rock-on. This is actually the recommended way (if not the only one) to update most docker images (on which rock-ons are based).
You will find more details, explanations, and most importantly instructions on how to do so in the post below: