data preprocess error

[expresschen]

operands could not be broadcast together with shapes (1,1025) (0,)
File "/home/ubuntu/Tacotron-2-master/datasets/preprocessor.py", line 42, in
return [future.result() for future in tqdm(futures) if future.result() is not None]
File "/home/ubuntu/Tacotron-2-master/datasets/preprocessor.py", line 42, in build_from_path
return [future.result() for future in tqdm(futures) if future.result() is not None]
File "/home/ubuntu/Tacotron-2-master/preprocess.py", line 17, in preprocess
metadata = preprocessor.build_from_path(hparams, input_folders, mel_dir, linear_dir, wav_dir, args.n_jobs, tqdm=tqdm)
File "/home/ubuntu/Tacotron-2-master/preprocess.py", line 83, in run_preprocess
preprocess(args, input_folders, output_folder, hparams)
File "/home/ubuntu/Tacotron-2-master/preprocess.py", line 106, in main
run_preprocess(args, modified_hp)
File "/home/ubuntu/Tacotron-2-master/preprocess.py", line 110, in
main()

[mini]

I managed to fix this by updating librosa to 0.6.2