Cannot create unknown type - How to solve?

I could be wrong, but I believe the Orchestrator uses the packages that’s in the publish.json file and looks on the machine that the Robot is running on. So, it’s on a per machine basis, not necessarily with the Orchestrator. If the user id that the Robot is using has a conflict of package version then that error can happen. One thing you can check is the packages that the user id has installed and ensure that they match what is in the publish.json file.

Also, make sure you republish if you correct the packages.