pe-rag.ipynb Notebook issue

Getting Started with Rag link from https://www.promptingguide.ai/techniques/rag leads to https://github.com/dair-ai/Prompt-Engineering-Guide/blob/main/notebooks/pe-rag.ipynb which looks to have an error on it related to the notebook's state. Screenshot attached

Open notebooks/pe-rag.ipynb from the linked Getting Started with RAG page and inspect the notebook state associated with the attached screenshot. Reproduce the reported error and compare the notebook's saved state; done when the linked notebook no longer shows the reported issue.

Written by the indexing model from the issue text.