ModuleNotFoundError: No module named 'optimum' when loading model in TextGenerationWebUI

[Robtles]

System Info

• transformers version: 4.46.2
• Platform: macOS-15.1-arm64-arm-64bit-Mach-O
• Python version: 3.13.0
• Huggingface_hub version: 0.26.2
• Safetensors version: 0.4.5
• Accelerate version: not installed
• Accelerate config: not found
• PyTorch version (GPU?): not installed (NA)
• Tensorflow version (GPU?): not installed (NA)
• Flax version (CPU?/GPU?/TPU?): not installed (NA)
• Jax version: not installed
• JaxLib version: not installed

Who can help?

No response

Information

• The official example scripts
• My own modified scripts

Tasks

• An officially supported task in the examples folder (such as GLUE/SQuAD, ...)
• My own task or dataset (give details below)

Reproduction

I have cloned text-generation-webui on my M2 MacBook Pro and am trying to install a model from huggingface in it. I am following the steps and have chosen Transformers as the model loader, but am getting this error:

23:48:52-670995 INFO     TRANSFORMERS_PARAMS=                                                                                    
{'low_cpu_mem_usage': True, 'torch_dtype': torch.float16}

23:48:52-672915 ERROR    Failed to load the model.                                                                               
Traceback (most recent call last):
  File "/Users/rob/IA/text-generation-webui/modules/ui_model_menu.py", line 232, in load_model_wrapper
    shared.model, shared.tokenizer = load_model(selected_model, loader)
                                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/rob/IA/text-generation-webui/modules/models.py", line 93, in load_model
    output = load_func_map[loader](model_name)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/rob/IA/text-generation-webui/modules/models.py", line 172, in huggingface_loader
    model = LoaderClass.from_pretrained(path_to_model, **params)
            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/rob/IA/text-generation-webui/installer_files/env/lib/python3.11/site-packages/transformers/models/auto/auto_factory.py", line 564, in from_pretrained
    return model_class.from_pretrained(
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/rob/IA/text-generation-webui/installer_files/env/lib/python3.11/site-packages/transformers/modeling_utils.py", line 3652, in from_pretrained
    hf_quantizer = AutoHfQuantizer.from_config(config.quantization_config, pre_quantized=pre_quantized)
                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/rob/IA/text-generation-webui/installer_files/env/lib/python3.11/site-packages/transformers/quantizers/auto.py", line 148, in from_config
    return target_cls(quantization_config, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/rob/IA/text-generation-webui/installer_files/env/lib/python3.11/site-packages/transformers/quantizers/quantizer_gptq.py", line 47, in __init__
    from optimum.gptq import GPTQQuantizer
ModuleNotFoundError: No module named 'optimum'

Expected behavior

Model shoud load fine.

Thank you for your help. I'm pretty new with AI tools and any help is appreciated.