Scala runtime error after upgrading the IDE!

Hello all,

I've recently upgraded my Intellij IDE and Scala plugin, and since then I can't run my code! The following error is shown:

```

Exception in thread "main" java.lang.NoSuchMethodError: scala.Product.$init$(Lscala/Product;)V
at ch.epfl.data.dblab.frontend.parser.CalcAST$Variable.<init>(CalcAST.scala:91)
at ch.epfl.data.dblab.frontend.parser.CalcParser$$anonfun$parseVarList$3.apply(CalcParser.scala:332)
at ch.epfl.data.dblab.frontend.parser.CalcParser$$anonfun$parseVarList$3.apply(CalcParser.scala:328)

```

The error references instantiating of an arbitrary class.