Missing .wav files

I opened two different projects today and both have the same problem which is all of my .wav files are gone.  The .pkf files remain but all of the .wav are gone.  I went to the source folder and in the folder all that is there is the .pkf files.  I don't remember the program crashing. 

I typed in the name of the files into the search bar (2 of which have a fairly unique name rather than the automatice Track1_001 they were external files sent from the hall mics so they were titled 9.24.2020 von, these .wavs are also missing) and I cannot find these files on my computer anywhere.  They are offline in .sesx file.  Any idea where these could have gone and how I could retrieve them?

My version is 13.0.10.32 and I am on a macbook pro.