intellij IDEA - Edit Configuration

Question

I installed IntelliJ IDEA with Java10. I am having troubles with the build and run. I am being asked to edit the configuration. I have specified the JDK 10 in the module settings. Is that a bug ?

And, I get this error when I try to compile with a random configuration setting.

Error: Could not find or load main class Caused by: java.lang.ClassNotFoundException :

this part is really confusing and not really user-friendly and well documented by JetBrain I find

Answer 1

Right mouse click on the code window and select Run Your_file_name.kt It will show you the green button to run the script instantly like below screenshot. click on that button.