Fix res/values/styles.xml like so:
<style name="AppTheme" parent="Base.Theme.AppCompat.Light.DarkActionBar"/>
Detailed explanation as requested: Theme.AppCompat.Light.DarkActionBar
is a subclass of the superclass Base
anyway. Ctrl+click (Android Studio) on it and you will be taken to the source:
<style name="Theme.AppCompat.Light.DarkActionBar" parent="Base.Theme.AppCompat.Light.DarkActionBar" />
We didn’t change anything, we just defined it more precisely.