Why does IDEA report errors for build.sbt in a new sbt project?

Question

I'm running IntelliJ 13.1.5 community edition. I've got JDK, Scala, SBT installed. The JAVA_HOME, JDK_HOME, SCALA_HOME and SBT_HOME variables are set. If I create a new SBT project, after initial sbt refresh, I get this:

The thing compiles and runs fine, even if I add dependencies, but the file itself shows tonnes of errors. F4 settings show empty SBT module stuff:

I then installed https://github.com/mpeltonen/sbt-idea and ran sbt gen-idea in the project folder. This created a bunch of files, and reloading the project, the reds in the sbt file went away.

This is on my laptop. However, on my work machine, simply creating a new project works fine, and the sbt file isn't filled with red. Can't seem to figure out how that machine's different. Any pointers on how to resolve this annoying issue?

Answer 1

I was also getting highlighted errors in all of the build.sbt file. What fixed it was to select to Download "Sources for SBT and plugins" in the Import Project from SBT window.

Answer 2

In case IntelliJ IDEA struggles a bit with caching, try the first and if still not working the second should definitely do the trick:

• File -> Invalidate cache and restart
• Close IDEA, delete .idea, re-import your project