title: Security exception when trying to run Play
body: <p>My scala version is 2.12.8</p>
  
  <p>I downloaded <a href="https://developer.lightbend.com/start/?group=play&amp;project=play-scala-rest-api-example" rel="nofollow noreferrer">https://developer.lightbend.com/start/?group=play&amp;project=play-scala-rest-api-example</a></p>
  
  <p>Now trying to do : sbt run, but getting following exception.</p>
  
  <p>What is the fix for this? If I'm making mistake every time then maybe something I am missing always.</p>
  
  <pre><code>[error] sbt.librarymanagement.ResolveException: unresolved dependency: com.typesafe.play#sbt-plugin;2.7.0: Resolution failed several times for dependency: com.typesafe.play#sbt-plugin;2.7.0 {compile=[default(compile)]}:: 
  [error]     typesafe-ivy-releases: unable to get resource for com.typesafe.play#sbt-plugin;2.7.0: res=https://repo.typesafe.com/typesafe/ivy-releases/com.typesafe.play/sbt-plugin/scala_2.12/sbt_1.0/2.7.0/ivys/ivy.xml: javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
  [error]     sbt-plugin-releases: unable to get resource for com.typesafe.play#sbt-plugin;2.7.0: res=https://repo.scala-sbt.org/scalasbt/sbt-plugin-releases/com.typesafe.play/sbt-plugin/scala_2.12/sbt_1.0/2.7.0/ivys/ivy.xml: javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
  </code></pre>