By default, the model undergoes automatic mesh repair upon loading. The Mesh Repair feature scans the surface of the 3D model for any defects and attempts to fix them. If it is unable to fix a detected defect, an error message will appear and the file will open.
To turn off automatic mesh repair:
1. Go to > Preferences > General.
2. Select Disabled from the Mesh repairing during model loading drop-down.