MulticlassClassification sample doesn't finish training

I have cloned this repository and have set `MulticlassClassification_Iris` as my startup project. When I run the project, the console window pops up and I see the message `=============== Training the model ===============`.
However, the program doesn't finish training the model (I let it run for 40 mins and then quit).

I tried running the `SentimentAnalsysisConsoleApp` and that works just fine for me (runs in less than 20 seconds).