Reinstall the drivers from the official Parashara's Light Support or your installation media. : Do not plug the dongle in until the driver installation is complete.
If you are seeing the "Hardware key not found" error while trying to run Parashara's Light 9.0 , it typically means parashara light 90 hardware key not found best
Attempt the following solutions in order. Do not skip any step. Reinstall the drivers from the official Parashara's Light