IntelliJ IDEA and Gradle - Cannot be applied to '(groovy.lang.Closure)'

Question

I have a Gradle file which, whenever I load open it in IntelliJ IDEA 14.1.5, shows IDE errors for the entire file. Namely all the errors seem to be either:

java.

Answer 1

For me, after trying out all this answers without result, changing the Java SDK of the project did the trick, I was on 1.8 and changed it to the newest one, but still a project level language of 8.

Hope this helps!