Android Studio - designer doesn't see components?

Question

Android

There is an error in the designer and the elements are not displayed:
Render problem
Failed to load AppCompat ActionBar with unknown error.

compileSdkVersion 28
minSdkVersion 14
targetSdkVersion 28

appcompat:
'com.android.support:appcompat-v7:28.0.0-rc02'
If you replace

<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">

on the

<style name="AppTheme" parent="Base.Theme.AppCompat.Light.DarkActionBar">

then there is no error, but they write on SO that problems are possible in this case.

Answer 1

This is a known issue. Downgrade com.android.support:appcompat-v7to stable.

Answer 2

Try switching SDK or theme here.