How to use custom TTS?

[SuperMaximus1984]

RedTheDocs of this project says I can run with CLI syntax like below:
python app.py --tts gpt-sovits --TTS_SERVER http://127.0.0.1:8080 --REF_FILE ref.wav --REF_TEXT xxx

But then I face the error
'LipReal' object has no attribute 'tts'
or
AttributeError: 'NeRFReal' object has no attribute 'tts'
depending on the model I choose.

My fishTTS is up & running on http://127.0.0.1:8080, OpenAPI is hooked up, but LiveTalking docker container throws the above errors when I press WebUI "Start" button.

Please help to run with custom TTS.
Thank you!