Please click the product name on the top menu, go Preferences->Conversion->Enable DVD navigator, change (check or uncheck) the setting, click OK to save the change, then try to load your disc again.
If still doesn’t work, please go to the DVD folder. Find all the IFO files under the VIDEO_TS folder, then compress them to send to us at support#leawo.com(replace#with@). We will check and offer you a solution.
This FAQ is about: Blu-ray Copy for Mac, Blu-ray Ripper for Mac, Blu-ray to MKV Converter for Mac, DVD Copy for Mac, DVD Ripper for Mac, Frequently Asked Questions, Total Media Converter Ultimate for Mac, Video Converter Pro for Mac, Video Converter Ultimate for Mac