There are three reasons why Rhino does not load RhinoArtisan:
Let's check what Rhino version we are using. To do this, we will open Rhino, in the menu Help > About Rhinoceros.
In the dialog, you will the version Rhinoceros 7.0.
Every 2-3 months, Rhino release new updates with improvements and bug fixes. Let's update to the latest version, it is free.
In Rhino, in the Help menu > Check for Updates...
In the dialog, you will have the option to update, in our case, we are running the latest version.
We recommend checking the Enable updates and usage statistics option. You will check for new updates every time you run Rhino.
In some cases, there may be problems installing Rhino, so at this point, we recommend uninstalling and reinstalling it. We will have a clean installation, which will make Rhino run much faster and be able to load plugins.
To uninstall Rhino, please check Rhinoceros documentation. https://wiki.mcneel.com/rhino/uninstalling