The code: “sqlite3.rc”: “11” indicates you are getting a corrupt database error. It is likely that you will not be able to recover your project.
Your best chances at recovery are to try Steve’s suggestions here:
If following Steve’s suggestion is not fruitful, sometimes it is possible to extract the raw audio data, ignoring all of the database structure information. This works best for a mono recording before any editing is done. However for a stereo recording or for heavily edited files, reconstruction can be a nightmare. I (and another elf) have a program that can sometimes do this extraction. If you get this far, zip up your .aup3 file and upload it to a file sharing service. Post (or PM me) a link to the file, and I’ll take a look at it.