Last build don't work anymore

hi,

I've past some time today to build a project with Scala/Sbt or Scala/Typesafe (with akka/actor) and nothing seems to work with intellij IDEA.
I have created projects for months now and it was good.

For example, i have created typesafe activator Scala-Akka-Seed template.
It work fine from sbt tool. It run from Intellij IDEA wia 'run'. But the editor makes 50% of words red. Error are everywhere.

I have IntellijIDEA14-IU-139.463.4 with ScalaPlugin 1.1.2. and Typesafe Activator 1.2.10.
All turn on Windows 10.