It seems like the issue might be related to the properties of the model itself, such as overlapping surfaces or non-manifold geometry. I recommend checking the model in a 3D modeling software to ensure it is solid and has proper geometry. Additionally, verify if the model is in a compatible file format for slicing with Orca Slicer. If the issue persists, you may want to reach out to the model's creator or Orca Slicer's support for further assistance.
hollow thunder