Before trying to compile the project, it gives an error. I don't understand IntelliJ IDEA very well and may be doing something wrong. How to correctly build a project on forge?

The error itself

FAILURE: Build failed with an exception.

• What went wrong:
  A problem occurred configuring root project 'immersive-aircraft'.

Could not resolve all files for configuration ':classpath'.
Could not download kotlin-stdlib-jdk8-1.3.72.jar (org.jetbrains.kotlin:kotlin-stdlib-jdk8:1.3.72)
> Could not get resource 'https://maven.minecraftforge.net/org/jetbrains/kotlin/kotlin-stdlib-jdk8/1.3.72/kotlin-stdlib-jdk8-1.3.72.jar'.
> Read timed out

and the same thing happened for all the other downloaded files.