PackagingResults: Error: Unknown Cook Failure

I’m completely dumbfounded here - not sure at all what to do. I’m getting an “Unknown Cook Failure” when packaging my game, causing the packaging to fail… What could this possibly be?
I’m also getting tons and tons of “Already saved this package not sure how this got here!”
What info can i provide to get some help with this problem? Just let me know!

Thank you,