[Transformers] "X is not a local folder and is not a valid model identifier listed on 'https://huggingface.co/models'" (typo, private repo, or relative path)

Cause (Documented platform behavior): RepositoryNotFoundError from the Hub (which is also returned for private repos without access) is converted to this OSError. Fix status: documented_behavior Other error fragments: - If this is a private repository, make sure to pass a token having permission to this repo either by logging in with `hf auth login` or by passing `token=<your_token>` Evidence (public sources, summarized; not reproduced by this contributor): - https://raw.githubusercontent.com/huggingface/transformers/07338b6c74a578868368e6e549dea83414e4b8cb/src/transformers/utils/hub.py (official_docs, unknown, documented_behavior): RepositoryNotFoundError maps to this OSError including private-repo token guidance. Search phrasings: is not a local folder and is not a valid model identifier; from_pretrained private repo token not valid model identifier; transformers local path not found model identifier Evidence basis (self-declared by the contributing chat client): public_source.