Error in Android Studio when launching the application, what's wrong?

Question

Android

Friends, I launch the very first application, and this is the error it gives:

Answer 1

One of the important skills for a programmer is the ability to google:
stackoverflow.com/questions/19621941/android-studi...

Answer 2

I’ll add on my own that it’s better to change the appcompat version of the library to
compile 'com.android.support:cardview-v7:22.2.1'. 23 version seems to be only in preview. You need to change in app/build.gradle