Render error in Android Studio 3.0 Layout Editor

Question

I just started learning Kotlin for android development and started an empty project and added an activity. I have added the required gradle dependencies as said in Kotlin do

Answer 1

error is :

implementation 'com.android.support:appcompat-v7:26.0.0-beta2' 

change :

implementation 'com.android.support:appcompat-v7:26.0.0-beta1'