title: Not found object error when importing external library in intellij
body: <p>Here is my sbt file <code>myproject/build.sbt</code></p>
  
  <pre><code>version := "1.0"
  scalaVersion := "2.12.1"
  libraryDependencies ++= Seq(
    "com.typesafe.akka" %% "akka-actor" % "2.4.16",
    "io.circe" %% "circe-core" % "0.6.1",
    "io.circe" %% "circe-generic" % "0.6.1",
    "io.circe" %% "circe-parser" % "0.6.1"
  )
  </code></pre>
  
  <p>Here is my scala file <code>myproject/src/test.scala</code></p>
  
  <pre><code>package mytest
  import akka._
  object test {
      def main(args: Array[String]) {
        print(2)
      }
  }
  </code></pre>
  
  <p>I verified that my external library contains, akka</p>
  
  <p>but intellij keep saying that </p>
  
  <pre><code>Error:(7, 8) not found: object akka
  import akka._
  </code></pre>
  
  <p>I am using <code>intellij community edition 2016.3</code> with the latest scala plugin (which should include latest sbt)</p>
  
  <p>Can someone give me a hint on how to resolve this?</p>