I have the following problem on IntelliJ IDEA 14:
I created a Play (Scala) project using the Activator (v1.2.10). Then, I converted it to an IDEA project using act
Have you tried File | Import Project
and select build.sbt
file?
IDEA imports it as an SBT
project, with all the dependencies properly resolved. It works fine for me on IDEA 14 and on 13.
In this case simply import manually the "build.sbt" from your project, so if the directory is ~/Documents/myPlayApp then choose to import ~/Documents/myPlayApp/build.sbt
Apparently, this is a bug in some versions of IntelliJ 14, that just got fixed (as of version 14.0.3). Updating IJ then updating the scala plugin seems to make things work.