I need Help

Hi,
I made a game using unity for android. I did every thing ok, I built and run the game on my device and it’s working perfectly.BUT when I try to upload the apk file to google play it’s uploading untill it reach 100% and then pop up a message that says :

Import failed.
Please add an icon to your APK.

I dont really know what’s happend cuz I added already an icon to my game in unity (512*512 PNG image), and I already uploaded many apk files of other games to google play without problems.
I deleted my current icon in my unity project and switch off unity, then run it again and added once again the icon and built new apk file. But it’s not working, google play show me the same message.
If someone can help me i will be really thankful.

am having the same issue as well I cant figure out i tried multiple times