No such file or directory: 'trainfiles.json' (on Step 8, after Step 8 working before)

[daynightcycle]

I was training the pitch predictor for a while before it disconnected. When it reconnected, Step 8 kept giving me this message:

FileNotFoundError: Error instantiating 'nemo.collections.asr.data.audio_to_text.AudioToCharWithDursF0Dataset' : [Errno 2] No such file or directory: 'trainfiles.json'

I tried restarting and reinstalling NeMo. That didn't work. In a different Colab, I couldn't get Step 8 to run due to this message. I abandoned that one and restarted with this new how. Somehow it worked once and then stopped working.