So before I updated Unity from 2017 to 2018.1.0b4, the icon used to work just fine. After I updated Unity, for some reason the icon doesn’t show.
I tried opening a brand new project and setting it a random icon, built it, and uploaded it on my phone, but it didn’t have any icons either. Is there any fix to this bug?
Have you checked EVERYTHING? Is the image that your using actually supported, is it PNG JPEg? Is it the correct size. It should work. Try looking online to see if you find anything. It should work if you simply put an image there. Are you building for Android or IOS? More information could be used in your post.
So what I did was:
I just downloaded 2017.3 version again. Opened my project and boom. I have my icon again, yay! I won’t be using 2018 for some time. I recommend you to do the same