After packing the android game on ue 5.1. the game does not start?

Good day to everyone. I had a problem after packing a game for android on ue 5.1. The problem is that after installing the game on android, the main menu opens, but when I press start there are no actions, and if I press exit, then the game exits. On the ue5.1 itself, everything works on previous versions, everything also worked, even after packing the game. What could be the reason for such a problem?

Can you show the code?

Thanks, I found a solution.