Unbelievable, but woocommerce want upload nonexistent image from Media library. That image deleted few minutes ago and does not exist in Media library anymore. It means when media library open, immediately I have checked nonexistent image for upload and then you can choose another image for upload, but after upload, haven't nothing. Upload product gallery is ok. I have no idea how to solve it, I already reinstall wp and all plugins but nothing fixed. It is woocommerce issue, but where in woocommerce? Please help!