如何解决此异常加载类文件“SprayJsonSupport”时检测到的无效依赖关系。类别'

I'am using我正在使用

version := "1.0"
scalaVersion := "2.11.8"

scalacOptions := Seq("-unchecked", "-deprecation", "-encoding", "utf8")

libraryDependencies ++= {
  val akkaV = "2.4.18"
  val scalaTestV = "2.2.6"
  val akkaHttpV = "10.0.10"
}

我试着运行我的测试用例,但它显示出如下错误

  Error:scalac: missing or invalid dependency detected while loading class file 'SprayJsonSupport.class'.
    Could not access type FromByteStringUnmarshaller in package akka.http.scaladsl.unmarshalling.package,
    because it (or its dependencies) are missing. Check your build definition for
    missing or conflicting dependencies. (Re-run with `-Ylog-classpath` to see the problematic classpath.)
    A full rebuild may help if 'SprayJsonSupport.class' was compiled against an incompatible version of akka.http.scaladsl.unmarshalling.package.

请问我该如何解决这一问题。 非常感谢。