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java.lang.String: 	at org.json4s.reflect.package$.fail(package.scala:96)	at org.json4s.Extraction$ClassInstanceBuilder.org$json4s$Extraction$ClassInstanceBuilder$$buildCtorArg(Extraction.scala:443)	at org.json4s.Extraction$ClassInstanceBuilder$$anonfun$14.apply(Extraction.scala:463)	at org.json4s.Extraction$ClassInstanceBuilder$$anonfun$14.apply(Extraction.scala:463)	at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:244)	at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:244)	at scala.collection.mutable.ResizableArray$class.foreach(ResizableArray.scala:59)	at scala.collection.mutable.ArrayBuffer.foreach(ArrayBuffer.scala:47)	at scala.collection.TraversableLike$class.map(TraversableLike.scala:244)	at scala.collection.AbstractTraversable.map(Traversable.scala:105)	at org.json4s.Extraction$ClassInstanceBuilder.org$json4s$Extraction$ClassInstanceBuilder$$instantiate(Extraction.scala:451)	at org.json4s.Extraction$ClassInstanceBuilder$$anonfun$result$6.apply(Extraction.scala:491)	at org.json4s.Extraction$ClassInstanceBuilder$$anonfun$result$6.apply(Extraction.scala:488)	at org.json4s.Extraction$.org$json4s$Extraction$$customOrElse(Extraction.scala:500)	at org.json4s.Extraction$ClassInstanceBuilder.result(Extraction.scala:488)	at org.json4s.Extraction$.extract(Extraction.scala:332)	at org.json4s.Extraction$CollectionBuilder$$anonfun$6.apply(Extraction.scala:341)	at org.json4s.Extraction$CollectionBuilder$$anonfun$6.apply(Extraction.scala:341)	at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:244)	at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:244)	at scala.collection.immutable.List.foreach(List.scala:318)	at scala.collection.TraversableLike$class.map(TraversableLike.scala:244)	at scala.collection.AbstractTraversable.map(Traversable.scala:105)	at org.json4s.Extraction$CollectionBuilder.mkCollection(Extraction.scala:341)	at org.json4s.Extraction$CollectionBuilder.result(Extraction.scala:365)	at org.json4s.Extraction$.extract(Extraction.scala:320)	at org.json4s.Extraction$ClassInstanceBuilder.org$json4s$Extraction$ClassInstanceBuilder$$buildCtorArg(Extraction.scala:431)