Base64 Converter incorrect length 54 must be multiple of 4

Please try the newest Scala plugin build (0.7.58).

will try new plugin imminently.
It wants to enable all sorts of other plugins - Spring, AspectJ etc - is that deliberate?

I'm using 12.01 with Scala plugin 0.7.58; it never asked me to activate any other plugin. The only two plugins I have installed except bundled ones are Scala and SBT.

odd. Community or ultimate? Maybe it's play! related. Anyhow - message for Pavel - it is now working ok with that combo 12.01 and 0.7.58 Thanks!

Ah..... using CE

I started getting the same error. UsingIU-123.100, Scala plugin 0.7.64. After creating a new Scala project, at first everyting was fine. After couple of edits and running the tests, I started getting consistant errors (see below). The only way aroud was to turn off external build and use FSC.

Error: scala: Unable to read an event from: Nothing <: javafx.util.converter.BigDecimalStringConverter?
scala: Error: Incorrect length 57. Must be a multiple of 4
java.lang.IllegalArgumentException: Incorrect length 57. Must be a multiple of 4
    at com.intellij.util.Base64Converter.decode(Base64Converter.java:134)
    at org.jetbrains.jps.incremental.scala.remote.RemoteServer$.liftedTree1$1(RemoteServer.scala:75)
    at org.jetbrains.jps.incremental.scala.remote.RemoteServer$.org$jetbrains$jps$incremental$scala$remote$RemoteServer$$handle(RemoteServer.scala:74)
    at org.jetbrains.jps.incremental.scala.remote.RemoteServer$$anonfun$send$1$$anonfun$apply$1$$anonfun$apply$3.apply(RemoteServer.scala:44)
    at org.jetbrains.jps.incremental.scala.remote.RemoteServer$$anonfun$send$1$$anonfun$apply$1$$anonfun$apply$3.apply(RemoteServer.scala:43)
    at org.jetbrains.jps.incremental.scala.package$.using(package.scala:15)
    at org.jetbrains.jps.incremental.scala.remote.RemoteServer$$anonfun$send$1$$anonfun$apply$1.apply(RemoteServer.scala:43)
    at org.jetbrains.jps.incremental.scala.remote.RemoteServer$$anonfun$send$1$$anonfun$apply$1.apply(RemoteServer.scala:40)
    at org.jetbrains.jps.incremental.scala.package$.using(package.scala:15)
    at org.jetbrains.jps.incremental.scala.remote.RemoteServer$$anonfun$send$1.apply(RemoteServer.scala:40)
    at org.jetbrains.jps.incremental.scala.remote.RemoteServer$$anonfun$send$1.apply(RemoteServer.scala:39)
    at org.jetbrains.jps.incremental.scala.package$.using(package.scala:15)
    at org.jetbrains.jps.incremental.scala.remote.RemoteServer.send(RemoteServer.scala:39)
    at org.jetbrains.jps.incremental.scala.remote.RemoteServer.compile(RemoteServer.scala:24)
    at org.jetbrains.jps.incremental.scala.ScalaBuilder$$anonfun$5$$anonfun$apply$3$$anonfun$apply$4.apply(ScalaBuilder.scala:110)
    at org.jetbrains.jps.incremental.scala.ScalaBuilder$$anonfun$5$$anonfun$apply$3$$anonfun$apply$4.apply(ScalaBuilder.scala:100)
    at scala.util.Either$RightProjection.map(Either.scala:536)
    at org.jetbrains.jps.incremental.scala.ScalaBuilder$$anonfun$5$$anonfun$apply$3.apply(ScalaBuilder.scala:100)
    at org.jetbrains.jps.incremental.scala.ScalaBuilder$$anonfun$5$$anonfun$apply$3.apply(ScalaBuilder.scala:99)
    at scala.util.Either$RightProjection.flatMap(Either.scala:523)
    at org.jetbrains.jps.incremental.scala.ScalaBuilder$$anonfun$5.apply(ScalaBuilder.scala:99)
    at org.jetbrains.jps.incremental.scala.ScalaBuilder$$anonfun$5.apply(ScalaBuilder.scala:98)
    at scala.util.Either$RightProjection.flatMap(Either.scala:523)
    at org.jetbrains.jps.incremental.scala.ScalaBuilder.doBuild(ScalaBuilder.scala:98)
    at org.jetbrains.jps.incremental.scala.ScalaBuilder.build(ScalaBuilder.scala:67)
    at org.jetbrains.jps.incremental.scala.ScalaBuilderService$ScalaBuilderDecorator.build(ScalaBuilderService.java:42)
    at org.jetbrains.jps.incremental.IncProjectBuilder.runModuleLevelBuilders(IncProjectBuilder.java:963)
    at org.jetbrains.jps.incremental.IncProjectBuilder.runBuildersForChunk(IncProjectBuilder.java:710)
    at org.jetbrains.jps.incremental.IncProjectBuilder.buildTargetsChunk(IncProjectBuilder.java:740)
    at org.jetbrains.jps.incremental.IncProjectBuilder.buildChunkIfAffected(IncProjectBuilder.java:673)
    at org.jetbrains.jps.incremental.IncProjectBuilder.buildChunks(IncProjectBuilder.java:494)
    at org.jetbrains.jps.incremental.IncProjectBuilder.runBuild(IncProjectBuilder.java:274)
    at org.jetbrains.jps.incremental.IncProjectBuilder.build(IncProjectBuilder.java:164)
    at org.jetbrains.jps.cmdline.BuildRunner.runBuild(BuildRunner.java:122)
    at org.jetbrains.jps.cmdline.BuildSession.runBuild(BuildSession.java:205)
    at org.jetbrains.jps.cmdline.BuildSession.run(BuildSession.java:102)
    at org.jetbrains.jps.cmdline.BuildMain$MyMessageHandler$1.run(BuildMain.java:107)
    at org.jetbrains.jps.service.impl.SharedThreadPoolImpl$1.run(SharedThreadPoolImpl.java:26)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
    at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
    at java.util.concurrent.FutureTask.run(FutureTask.java:166)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
    at java.lang.Thread.run(Thread.java:722)