about the result

[dengg1013]

Training Epoch 1: 70it [21:39, 18.56s/it]
2023-04-30 22:07:22,768 : INFO : Step: 140
2023-04-30 22:07:22,770 : INFO : Epochs: 2
2023-04-30 22:07:22,770 : INFO : Slot Loss: nan
2023-04-30 22:07:22,770 : INFO : Intent Loss: nan
...
2023-04-30 22:08:42,015 : INFO : slot f1: 0
2023-04-30 22:08:42,015 : INFO : intent accuracy: 71.04377104377105
2023-04-30 22:08:42,015 : INFO : semantic error(intent, slots are all correct): 0.0
could you have a check why the result like this?