RoBERTa used for question embedding

[Fragile-hue]

When I run RoBERTa/main.py to train the model, When I use RoBERTa for question embedding, after running the following code, the values in the roberta_last_hidden_states are all nan. Why is this?
roberta_last_hidden_states = self.roberta_model(question_tokenized, attention_mask=attention_mask)[0]