Ok, my problem seems to be similar to this, and this, but following the answers, there is not helping me. This might be because I am using Xcode 5, before I upgraded to this
I had the similar issue with an error about iTunesArtwork and warning about 120 icon and the "Use Asset Catalog" worked for me where I filled the missing icons by dragging from project navigation pane and didn't do anything with iTunesArtwork though.
Edit:
My previous solution didn't work this time for same error for my react native app. My faulty icons images were causing this very issue. I opened one of the icon in Preview and selected the whole image area and created new image from clipboard. I replaced all the old images by these newly created images and upload went successful.