Not sure what the problem is, but for sure you don’t need Java 9, indeed there might even be problems with Java 9, I would stay at 8 or 7 (you need 8 if you’re project uses Scala 2.12). The standard downloads for IntelliJ will be bundled with a JDK 8 AFAIK.
Perhaps trying to set the sbt version explicitly. Create
C:/Users/haiaho/AppData/Local/Temp/sbt-project/project/build.properties with the contents
Then try refreshing the project in IntelliJ (or just quit and restart). Given that the window says “Error Downloading Scala 2.12.4”, perhaps it was just a temporary network problem?