有人遇到和我一样的问题吗'NoneType' object is not subscriptable

[3xiaoxin]

File "C:\Users\孤星\Downloads\Stock_Market_Sentiment_Analysis-master\Stock_Market_Sentiment_Analysis-master\model_dl.py", line 268, in
df = eval_models()
File "C:\Users\孤星\Downloads\Stock_Market_Sentiment_Analysis-master\Stock_Market_Sentiment_Analysis-master\model_dl.py", line 248, in eval_models
score.extend(train_model_MLP())
File "C:\Users\孤星\Downloads\Stock_Market_Sentiment_Analysis-master\Stock_Market_Sentiment_Analysis-master\model_dl.py", line 147, in train_model_MLP
hist = model.fit(x_train, y_train,
File "C:\Users\孤星\AppData\Roaming\Python\Python39\site-packages\keras\utils\traceback_utils.py", line 70, in error_handler
raise e.with_traceback(filtered_tb) from None
File "C:\Users\孤星\Downloads\Stock_Market_Sentiment_Analysis-master\Stock_Market_Sentiment_Analysis-master\model_dl.py", line 117, in on_epoch_end
val_predict = (np.asarray(self.model.predict(self.validation_data[0]))).round()
TypeError: 'NoneType' object is not subscriptable