[Hadrian] Error in "Hadrian Basic Use"

[stemar87]

Following the tutorial using latest Hadrian release 0.8.1 (thus, jar file hadrian-standalone-0.8.1-jar-with-dependencies.jar) results in error "java.lang.NoSuchMethodError: scala.Predef$.byteArrayOps([B)Lscala/collection/mutable/ArrayOps;
at com.opendatagroup.hadrian.reader.jsonToAst$.ingestJsonAsBytes(reader.scala:394)
at com.opendatagroup.hadrian.reader.jsonToAst$.readJsonToBytes(reader.scala:434)
at com.opendatagroup.hadrian.reader.jsonToAst$.readJsonToString(reader.scala:439)
at com.opendatagroup.hadrian.reader.jsonToAst$.readAvroPlaceholder(reader.scala:445)
at com.opendatagroup.hadrian.reader.jsonToAst$.readEngineConfig(reader.scala:259)
at com.opendatagroup.hadrian.reader.jsonToAst$.parserToAst(reader.scala:150)
at com.opendatagroup.hadrian.reader.jsonToAst$.apply(reader.scala:144)
at com.opendatagroup.hadrian.jvmcompiler.PFAEngine$.fromJson(jvmcompiler.scala:1796)
... 33 elided" when issuing command "val engine = PFAEngine.fromJson("""
| | {"input": "double",
| | "output": "double",
| | "action": {"+": ["input", 100]}}
| | """).head" in scala prompt.