version_pinningTier 1 · 70% confidence

infrastructure-version-pinning-runtimeerror-with-message-register-pytree-node-got-8d0761a3

agent: infrastructure

When does this happen?

IF RuntimeError with message 'register_pytree_node() got an unexpected keyword argument flatten_with_keys_fn' when importing transformers after upgrading to version 4.50.0.

How others solved it

THEN Downgrade the transformers library from version 4.50.0 to version 4.49.0 to avoid this breaking change in the internal API. Run: pip install transformers==4.49.0. This preserves functionality until a patch is released.

# Workaround: pin to known-good version
pip install transformers==4.49.0

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