When I ran play run , I have the following error :
[error] (*:update) sbt.ResolveException: download failed: org.slf4j#slf4j-api;1.6.6!slf4j-api.jar
[warn] some of the dependencies were not recompiled properly, so classloader is not avaialable
Solution
vi ./project/plugins.sbt
You only have to edit this file and add the last version of play (2.1.0) :
// Comment to get more information during initialization
logLevel := Level.Warn
// The Typesafe repository
resolvers += "Typesafe repository" at "http://repo.typesafe.com/typesafe/releases/"
// Use the Play sbt plugin for Play projects
addSbtPlugin("play" % "sbt-plugin" % "2.1.0")
Then you can launch play run again