COMBO with nsf-hifigan no config.json

According to the main releases prerelease 2.0: ``` (...) You can train such a model by using configs/config_naivev2diff_comb.yaml and combining them with a fine-tuning vocoder using combo.py. fine-tuning vocoder: https://github.com/openvpi/SingingVocoders ``` After trying to combo with vocoder I get an error about missing config.json `FileNotFoundError: [Errno 2] No such file or directory: 'E:\\Diffusion-SVC\\pretrain\\nsf_hifigan\\config.json'` But there is only yaml config file. Where can I get json config file? Am I missing something?