Uploading APK file error “The picture in the apk is invalid.”

Uploading APK file error "The picture in the apk is invalid."

I got an error "Upload failed.The picture in the apk is invalid." when I
uploaded my .apk file to to the Google Play market.
All the images file type is either .gif or .png in my package.
Besides, I searched some answers about the uploading error here but it
didn't work .Can anyone help me?