Hi again,
As we suspected, the error comes from the render farm. They don't allow the user to run scripts in the render farm. As I mentioned above, Ornatrix needs this script to prepare the hair for rendering. The solution is to remove the render flag scripts as you already did, set them manually and render as you did before. As a note, Agustin from Rebus also mentioned that the hair simulation should be baked.
Jeordanis Figuereo (Product Designer. EPHERE Inc.)