I checked most of the Jackal files in Bambu and they're opening for me without any issue. MB is a lot lower than most of my masks so that shouldn't be an issue for Bambu. I don't have Prusa slicer installed, but if they're all opening in bambu I assume this is something user-end. Could be an issue with your computer/software or your copies could have become corrupted. I would recommend re-downloading, or if you still have the zip you can probably just re-unzip. If a fresh copy of the Jackal doesn't open, its probably an issue with your computer.