AssertionError when trying to generate GTA spectrograms

[dmenendez20020370]

Hello.
I am a newbie on faking voices and I am trying to fine-tune HiFi-GAN for a personal project using this colab notebook
When trying to generate GTA spectrograms:

"!python GTA.py -c tacomodel -o GTAOutput" an AssertionError appears

I have tried with a large dataset and a small one with 30 phrases.
I have checked puntuation, samplerate and mono sound for wav files.
Also checked train_filelist.txt, val_filelist.txt using a small dataset to avoid errors and still gettting "AssertionError"

Do you think it is a dataset error or something inside the code?