:bee: Honeybee is a free and open source plugin to connect Grasshopper3D to EnergyPlus, Radiance, Daysim and OpenStudio for building energy and daylighting simulation
This has been asked a few times and the error message also tells you how to fix it. Your model is most likely in meters but the Rhino units are in millimeters.
Please continue the conversation on Discourse if you have any other questions. Thank you!