TypeError: Expected binary or unicode string, got 2789

[SeekPoint]

C:\ub16_prj\tianchi-ruijin>python train.py
Using TensorFlow backend.
2019-03-30 12:30:43.874911: I tensorflow/core/platform/cpu_feature_guard.cc:141] Your CPU supports instructions that this TensorFlow binary was not compiled to use: AVX2
GPU config done!
Traceback (most recent call last):
File "C:\Users\andyy\AppData\Local\Programs\Python\Python37\lib\site-packages\tensorflow\python\framework\tensor_util.py", line 558, in make_tensor_proto
str_values = [compat.as_bytes(x) for x in proto_values]
File "C:\Users\andyy\AppData\Local\Programs\Python\Python37\lib\site-packages\tensorflow\python\framework\tensor_util.py", line 558, in
str_values = [compat.as_bytes(x) for x in proto_values]
File "C:\Users\andyy\AppData\Local\Programs\Python\Python37\lib\site-packages\tensorflow\python\util\compat.py", line 61, in as_bytes
(bytes_or_text,))
TypeError: Expected binary or unicode string, got 2789

During handling of the above exception, another exception occurred: