Why does it give an error import android.support.v7.app.AlertDialog; in android studio and how to fix it?

Question

Android

I wrote a visual novel using TyranoBuilder and then tried to export the game to an android application using Android Studio. I did everything according to the instructions from the TyranoBuilder website ( tyranobuilder.com/exporting-for-android-devices ).
Next, I connected the phone in debug mode to the computer, and in Android Studio the device was displayed, but I can’t start the game on the phone - it says packege android.support.v7.app does not exist and import android.support.v7.app.AlertDialog;
Please tell me how to fix!
I'm in this android studio not in the tooth with my foot (

Answer 1

Maybe they created a project on AndroidX without the support of old libraries?
Delete them and connect the appropriate ones, without support.v7.