[COLAB] RuntimeError: Failed to import transformers.models.auto because of the following error (look up to see its traceback): module 'sentencepiece._sentencepiece' has no attribute 'delete_ImmutableSentencePieceText_ImmutableSentencePiece'

Author: HaikenEdgeCreated Jul 16, 2026Updated Jul 17, 2026

Got the following error today while running with

!pip uninstall -y xformers !pip install -U xformers !pip install "lightning_utilities==0.8.0" "lightning_fabric==1.9.5"

in a new cell after the Requirements cell:

Traceback (most recent call last):
  File "/usr/local/lib/python3.12/dist-packages/transformers/utils/import_utils.py", line 1146, in _get_module
    return importlib.import_module("." + module_name, self.__name__)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.12/importlib/__init__.py", line 90, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "<frozen importlib._bootstrap>", line 1387, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1360, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1310, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 488, in _call_with_frames_removed
  File "<frozen importlib._bootstrap>", line 1387, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1360, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1331, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 935, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 999, in exec_module
  File "<frozen importlib._bootstrap>", line 488, in _call_with_frames_removed
  File "/usr/local/lib/python3.12/dist-packages/transformers/models/__init__.py", line 15, in <module>
    from . import (
  File "/usr/local/lib/python3.12/dist-packages/transformers/models/mt5/__init__.py", line 29, in <module>
    from ..t5.tokenization_t5 import T5Tokenizer
  File "/usr/local/lib/python3.12/dist-packages/transformers/models/t5/tokenization_t5.py", line 24, in <module>
    import sentencepiece as spm
  File "/usr/local/lib/python3.12/dist-packages/sentencepiece/__init__.py", line 64, in <module>
    class ImmutableSentencePieceText_ImmutableSentencePiece(object):
  File "/usr/local/lib/python3.12/dist-packages/sentencepiece/__init__.py", line 70, in ImmutableSentencePieceText_ImmutableSentencePiece
    __swig_destroy__ = _sentencepiece.delete_ImmutableSentencePieceText_ImmutableSentencePiece
                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: module 'sentencepiece._sentencepiece' has no attribute 'delete_ImmutableSentencePieceText_ImmutableSentencePiece'

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/content/gdrive/MyDrive/sd/stable-diffusion-webui/webui.py", line 13, in <module>
    initialize.imports()
  File "/content/gdrive/MyDrive/sd/stable-diffusion-webui/modules/initialize.py", line 17, in imports
    import pytorch_lightning  # noqa: F401
    ^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.12/dist-packages/pytorch_lightning/__init__.py", line 34, in <module>
    from pytorch_lightning.callbacks import Callback  # noqa: E402
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.12/dist-packages/pytorch_lightning/callbacks/__init__.py", line 14, in <module>
    from pytorch_lightning.callbacks.callback import Callback
  File "/usr/local/lib/python3.12/dist-packages/pytorch_lightning/callbacks/callback.py", line 25, in <module>
    from pytorch_lightning.utilities.types import STEP_OUTPUT
  File "/usr/local/lib/python3.12/dist-packages/pytorch_lightning/utilities/types.py", line 28, in <module>
    from torchmetrics import Metric
  File "/usr/local/lib/python3.12/dist-packages/torchmetrics/__init__.py", line 14, in <module>
    from torchmetrics import functional  # noqa: E402
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.12/dist-packages/torchmetrics/functional/__init__.py", line 77, in <module>
    from torchmetrics.functional.text.bleu import bleu_score
  File "/usr/local/lib/python3.12/dist-packages/torchmetrics/functional/text/__init__.py", line 30, in <module>
    from torchmetrics.functional.text.bert import bert_score  # noqa: F401
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.12/dist-packages/torchmetrics/functional/text/bert.py", line 24, in <module>
    from torchmetrics.functional.text.helper_embedding_metric import (
  File "/usr/local/lib/python3.12/dist-packages/torchmetrics/functional/text/helper_embedding_metric.py", line 26, in <module>
    from transformers import AutoModelForMaskedLM, AutoTokenizer, PreTrainedModel, PreTrainedTokenizerBase
  File "<frozen importlib._bootstrap>", line 1412, in _handle_fromlist
  File "/usr/local/lib/python3.12/dist-packages/transformers/utils/import_utils.py", line 1136, in __getattr__
    module = self._get_module(self._class_to_module[name])
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.12/dist-packages/transformers/utils/import_utils.py", line 1148, in _get_module
    raise RuntimeError(
RuntimeError: Failed to import transformers.models.auto because of the following error (look up to see its traceback):
module 'sentencepiece._sentencepiece' has no attribute 'delete_ImmutableSentencePieceText_ImmutableSentencePiece'
[Colab paid products ](https://colab.research.google.com/signup?utm_source=footer&utm_medium=link&utm_campaign=footer_links)- [Cancel contracts here](https://colab.research.google.com/cancel-subscription)

Anybody got a fix?

Source: TheLastBen/fast-stable-diffusion