Updating reactivemongo due to PrimaryUnavailableException

While updating reactivemongo from "org.reactivemongo" %% "play2-reactivemongo" % "0.12.5-play26" to "org.reactivemongo" %% "play2-reactivemongo" % "0.20.13-play26" I am getting error (ref screenshot). I did a clean compile (sbt clean compile)

I dont know what this error mean. Here are the details of my project:

• scalaVersion := "2.11.7"
• addSbtPlugin("com.typesafe.play" % "sbt-plugin" % "2.6.3")

P.S: My reason of updating the reactivemongo version is I am getting lot of PrimaryUnavailableException and one of the answers here is to update reactivemongo version. Furthermore, I check my reactivemongo("org.reactivemongo" %% "play2-reactivemongo" % "0.12.5-play26") debug logs for the cause and found lot of error(ref below img) before the PrimaryUnavailableException

I ask you to please guide me on:

1. how to fix errors in 1st image.
2. If possible is updating reactivemongo the only solution to fix PrimaryUnavailableException.

Haven't used reactivemongo, but seems your problem comes from Play Iteratees moved to separate project.

Play Iteratees has been moved to a separate library hosted at https://github.com/playframework/play-iteratees. Since Play Iteratees has no dependencies on the rest of Play, the main change is that the you’ll have to specify the library manually:

libraryDependencies += "com.typesafe.play" %% "play-iteratees" % "2.6.1"

I think adding that dependency should fix the compilation error

Things that you should have in mind:

• scala 2.11 is not maintained anymore. Latest release was on November 9, 2017
• play 2.6 is not maintained anymore. All versions prior to Play 2.8 have reached their end of life and will no longer receive updates.
• play-iteratees is not maintained anymore. Latest release was on December 20, 2016