Hi there,
Sorry to hear about this. Looks like the file got corrupt/ damaged. There are multiple factors that can lead to file corruption, however, we can take a look and see if the file can be repaired. Please email your file to file@adobe.com & we will take a look at the file.
I must also inform you that file recovery can't be guaranteed with a 100% success. We'll surely try our best.
Regards,
Srishti