I have already asked this question before, I will just supplement it.
I converted my android project to c ++ (before that it was a blueprint). Now the packaged game does not start on the phone (it instantly crashes at startup, the logo does not even appear). I even removed the empty C ++ class that I used to transform my project. Why it happens? I do not see the logs, since they do not have time to be generated, the game crashes instantly. And this only happens on the phone. For some reason, everything starts on the pc.