IntelliJ 14 supports (in theory) SBT / Scala projects through the Scala plugin, which is still available in the official repo. According to this post \"Scala plugin project
I've finally figured out the exact problem. IntelliJ loaded the default settings of the previous version, including the old version of the Scala plugin. The problem was fixed uninstalling the old Scala plugin and following the steps posted by Eugene Zhulenev