Packaging error: Unknown error?

Hi!
I was trying to package my project for a play test but im getting this weird error. it is the first time this project is getting packaged. im putting the last log I got

I tried reading through it but I didn’t get what was generating this problem

Window > Developer Tools > Output Log. Use the filter at the top left corner of the Log window to filter by errors and warnings.

No errors, just a lot of warnings. But I don’t know exactly what to do

Log

Fix materials from the log file. Open up cue files and check what’s up.

I open all the cue files and when hitting play, there is no sound. even trying to press play from the content browser. I also tried my own sounds (and the ones from the starter content) and they are also not playing

You might have to replace these files with new ones.

I tried reimporting the sounds but still there is no sound for previewing…