If it's from a torrent then you just have to remove the torrent from your client or close the client as it is "in use" and can corrupt unzipping.The zip file seems to be having issues, the .pak file doesn't seem to be unzipping correctly
If it's from a DL it may have corrupted or you need to try a different zip client like 7zip or the default windows one.
I hope you're not unzipping the .pak file alone as it is not meant to be unzipped?