AttributeError: 'RVC' object has no attribute 'tgt_sr'

i get a crash and this error when starting the voice conversion:

C:\Users\mouse\Programs\Retrieval-based-Voice-Conversion-WebUI>gui_v1.py
2024-09-19 23:01:44 | INFO | faiss.loader | Loading faiss with AVX2 support.
2024-09-19 23:01:44 | INFO | faiss.loader | Could not load library with AVX2 support due to:
ModuleNotFoundError("No module named 'faiss.swigfaiss_avx2'")
2024-09-19 23:01:44 | INFO | faiss.loader | Loading faiss.
2024-09-19 23:01:44 | INFO | faiss.loader | Successfully loaded faiss.
2024-09-19 23:01:44 | INFO | configs.config | Found GPU NVIDIA GeForce RTX 4060 Ti
2024-09-19 23:01:44 | INFO | configs.config | Half-precision floating-point: True, device: cuda:0
Input device: 1:CABLE Output (VB-Audio Virtual
Output device: 4:Headphones (UC USB Headset)
cuda_is_available: True
Traceback (most recent call last):
  File "C:\Users\mouse\Programs\Retrieval-based-Voice-Conversion-WebUI\infer\lib\rtrvc.py", line 99, in __init__
    models, _, _ = fairseq.checkpoint_utils.load_model_ensemble_and_task(
  File "C:\Users\mouse\AppData\Roaming\Python\Python310\site-packages\fairseq\checkpoint_utils.py", line 423, in load_model_ensemble_and_task
    raise IOError("Model file not found: {}".format(filename))
OSError: Model file not found: assets/hubert/hubert_base.pt

Traceback (most recent call last):
  File "C:\Users\mouse\Programs\Retrieval-based-Voice-Conversion-WebUI\gui_v1.py", line 1070, in <module>
    gui = GUI()
  File "C:\Users\mouse\Programs\Retrieval-based-Voice-Conversion-WebUI\gui_v1.py", line 150, in __init__
    self.launcher()
  File "C:\Users\mouse\Programs\Retrieval-based-Voice-Conversion-WebUI\gui_v1.py", line 532, in launcher
    self.event_handler()
  File "C:\Users\mouse\Programs\Retrieval-based-Voice-Conversion-WebUI\gui_v1.py", line 566, in event_handler
    self.start_vc()
  File "C:\Users\mouse\Programs\Retrieval-based-Voice-Conversion-WebUI\gui_v1.py", line 805, in start_vc
    if self.rvc.tgt_sr != self.gui_config.samplerate:
AttributeError: 'RVC' object has no attribute 'tgt_sr'

Start with gui_v1.py, especially start_vc and the call to infer/lib/rtrvc.py where RVC initialization fails. Check how the missing assets/hubert/hubert_base.pt error affects initialization, then reproduce startup and verify that voice conversion proceeds without the subsequent tgt_sr AttributeError.