title: Play 2.5 Scala unresolved dependency suddenly
body: <p>I have a project running play 2.5 with Scala which was working fine until tonight. I suddenly cannot pull a bunch of dependencies .. I do not know what to do .. Here is the stacktrace: </p>
  
  <pre><code>sbt.ResolveException: unresolved dependency: io.netty#netty-
  codec;4.0.36.Final: not found
  unresolved dependency: io.netty#netty-handler;4.0.36.Final: not found
  unresolved dependency: org.asynchttpclient#netty-resolver-dns;2.0.2: not found
  unresolved dependency: com.typesafe.netty#netty-reactive-streams;1.0.4:not found
  unresolved dependency: org.javassist#javassist;3.20.0-GA: not found
  unresolved dependency: org.slf4j#slf4j-api;1.7.21: not found
  unresolved dependency: oauth.signpost#signpost-core;1.2.1.2: not found
  unresolved dependency: oauth.signpost#signpost-commonshttp4;1.2.1.2:not found
  unresolved dependency: com.sndyuk#logback-more-appenders;1.4.1:not found
  unresolved dependency: org.komamitsu#fluency;1.1.0: not found
  unresolved dependency: com.typesafe#config;1.3.1: not found
  unresolved dependency: org.scaldi#scaldi_2.11;0.5.8: not found
  unresolved dependency: org.scaldi#scaldi-play_2.11;0.5.14: not found
  unresolved dependency: org.scaldi#scaldi-akka_2.11;0.5.7: not found
  unresolved dependency: org.scaldi#scaldi-jsr330_2.11;0.5.9: not found
  unresolved dependency: org.json4s#json4s-native_2.11;3.3.0: not found
  unresolved dependency: org.json4s#json4s-ext_2.11;3.2.11: not found
  unresolved dependency: com.sksamuel.avro4s#avro4s-core_2.11;1.6.4: not found
  unresolved dependency: org.apache.avro#avro;1.8.1: not found
  unresolved dependency: org.apache.kafka#kafka_2.11;0.10.1.1: not found
  unresolved dependency: org.aspectj#aspectjrt;1.8.6: not found
  unresolved dependency: com.sksamuel.elastic4s#elastic4s-core_2.11;5.4.0: not found
  unresolved dependency: com.sksamuel.elastic4s#elastic4s-jackson_2.11;5.4.0: not found
  unresolved dependency: com.sksamuel.elastic4s#elastic4s-http_2.11;5.4.0: not found
  ....
  </code></pre>
  
  <p>How can I fix this ?</p>
  
  <p>Thanks a lot in advance.</p>