Android build doesn't work.

I have set up simple sidescroller preset in UE 4.23. Installed Android SDK and connected phone. Then I have clicked on launch and everything went down successfully. The game was installed on my phone but the problem is that it doesn´t load. When I launch it on my phone only thing I see is Unreal engine logo and a black screen behind it. The level doesn’t load up.
My phone: Xiomi Redmi 7A

Hi [USER=“561802”]Fansi Inkongnito[/USER]. Did you specify which level should be the default level to load when the application opens?