The community member is using Llama2 via HuggingFace and encountering an issue with the tokenizer. They have tracked the issue to a GitHub comment, but are unsure how to fix it. The comments suggest trying to load the tokenizer outside of llama-index and pass it in, as the capitalization may be causing issues. However, this did not work. Another community member suggests finding another HuggingFace repo with the config created properly, or as a last resort, editing the downloaded config files. The original poster confirms that the model was outdated, and they now have a different issue to address.