I need help with an application in app inventor

Hello, I need help, please, I have a finished app in appinventor. When I try it on the companion, it works perfectly, but when I download the apk and install it on my cell phone, it doesn't work. It's like it's blocked.

already disable unknown sources even disable the settings in play store.

The application crashes, the buttons that call the screen do not work, the phone even restarts.

I apologize for bothering you. I imagine you are a very busy person. I am new to this and I don't know who to turn to.
I thank you in advance if you can help me

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