Problems with app security on the cell phone

When I try to load the app to the cell phone, it rejects me for security

Hi Marco.

How does it reject you for security Marco? How are you loading the app? The QR code?
Do you have your phone Settings set to allow unknown apps? Settings>Security>Install unknown apps



I am using qr code
thanks a lot for your help,

You probably have a Huawei or Xianomi phone. Both of these use the Avast virus software that often identifies App Inventor 2 as having a virus falsely.

I would answer Ignorar . Your issue is similar to Problem with evo-gen virus

Hopes this advice helps Marco. The problem is most certainly an issue of Huawei/Xianomi and Avast.

You are right, my telephone is xiaomi. Thanks again