An error in the part of make train

[NingYueran]

Dear professor:
I'm sorry to disturb you, I met a problem in make train, the problem is as follows:
Traceback (most recent call last):
File "/home/admin318/anaconda3/lib/python3.8/runpy.py", line 194, in _run_module_as_main
return _run_code(code, main_globals, None,
File "/home/admin318/anaconda3/lib/python3.8/runpy.py", line 87, in _run_code
exec(code, run_globals)
File "/home/admin318/nl2bash-master/encoder_decoder/translate.py", line 378, in
tf.compat.v1.app.run()
File "/home/admin318/anaconda3/lib/python3.8/site-packages/tensorflow/python/platform/app.py", line 40, in run
_run(main=main, argv=argv, flags_parser=_parse_flags_tolerate_undef)
File "/home/admin318/anaconda3/lib/python3.8/site-packages/absl/app.py", line 312, in run
_run_main(main, args)
File "/home/admin318/anaconda3/lib/python3.8/site-packages/absl/app.py", line 258, in _run_main
sys.exit(main(argv))
File "/home/admin318/nl2bash-master/encoder_decoder/translate.py", line 320, in main
train_set, dev_set, test_set = data_utils.load_data(FLAGS, use_buckets=True)
File "/home/admin318/nl2bash-master/encoder_decoder/data_utils.py", line 136, in load_data
train_set = read_data(FLAGS, 'train', source, target, load_features=load_features,
File "/home/admin318/nl2bash-master/encoder_decoder/data_utils.py", line 250, in read_data
compute_copy_indices(sc_tokens, tg_tokens,
File "/home/admin318/nl2bash-master/encoder_decoder/data_utils.py", line 738, in compute_copy_indices
assert(len(sc_tokens) == len(sc_copy_tokens))
AssertionError
Makefile:42: recipe for target 'train' failed
I'm looking forward to your reply