no file named config.json found in directory ella_model path

[Liyi980]

When I run the command :
python3 inference.py test --save_folder ./assets/ella-inference-examples --ella_path ./models/ella_path/ella-sd1.5-tsc-t5xl.safetensors
it met an error:
OSError: Error no file named config.json found in directory ./models/stable-diffusion-v1-5.
But I found there's no config.json in the model that the author released.
Did anyone meet the same problem?