[Isaac Murphy]

You can try to create a new document and see how much, if anything, can be rescued if you try to File>Place the damaged one.
You can also try recovering it.
If you don’t have “enableContentRecovery”, enabled check this
https://helpx.adobe.com/illustrator/how-to/recover-files.html

Help recovering an Illustrator File
https://smallbusiness.chron.com/recover-work-illustrator-39270.html

Illustrator recovery online
https://illustrator.recoverytoolbox.com/online/