error occurs when text embedding using bert

[BaoyanWang]

Dear sir, thank for your work. I'd like to use bert instead of blstm when text embedding. error occurs as follow:
File "train.py", line 135, in
learner=Learner()
File "train.py", line 52, in init
self.yolo_model, self.yolo_body = self.create_model(yolo_weights_path=config['pretrained_weights'],freeze_body=config['free_body'])
File "train.py", line 87, in create_model
model_body = yolo_body(image_input, q_input, num_anchors,config) ###### place
File "/datadrive/soat_nlp/MCN/MCN-master/model/mcn_model.py", line 170, in yolo_body
return Model([inputs,q_input], [y,E,co_enery])
File "/usr/local/lib/python3.5/dist-packages/keras/legacy/interfaces.py", line 91, in wrapper
return func(*args, **kwargs)
File "/usr/local/lib/python3.5/dist-packages/keras/engine/network.py", line 93, in init
self._init_graph_network(*args, **kwargs)
File "/usr/local/lib/python3.5/dist-packages/keras/engine/network.py", line 147, in _init_graph_network
if len(set(self.inputs)) != len(self.inputs):
TypeError: unhashable type: 'list'