Community Edition first time build errors - Groovyc: [Static type checking]

Hi, I'm following the instroductions in link :
https://www.jetbrains.org/intellij/sdk/docs/basics/checkout_and_build_community.html 

I get these errors during first build. I'm at the master branch for all repositories.


I have no experience with groovy/java project. So I'm not sure if it is a real compile error or not. Do you have any idea?