It would seem that your initial installation of Harvest was not succesful because if it was then that command would work!
I would follow the installation steps again, preferably using the rpm or deb packages to install.
Alternatively, if you want an all-in-one solution download an OVA with a management GUI from here: https://nabox.tynsoe.org/
Solution Architect - 3rd Platform - Systems Engineering NetApp EMEA (and author of Harvest)
Blog: It all begins with data
If this post resolved your issue, please help others by selecting ACCEPT AS SOLUTION or adding a KUDO or both!