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

I also have this problem, solved as follows: modify the appcompat-v7:26.0.0-beta2 on build.gradle (modle:app) to appcompat-v7:26.0.0-beta1.