the wrong error information is:
java.lang.IllegalArgumentException: Unknown loss_name enum value :4
at fasttext.Args$loss_name.fromValue(Args.java:49)
at fasttext.Args.load(Args.java:127)
at fasttext.FastText.loadModel(FastText.java:147)

I trained this model use parameter like this:
fastText.exe supervised -input news_for_train1.csv -output news_ft2.model -dim 64 -lr 0.1 -epoch 100 -wordNgrams 5 -loss softmax