According to the post, something has broken the documentation at https://docs.llamaindex.ai/module_guides/indexing/document_management/, causing everything to return a 404 error. The community members in the comments indicate that some old redirects have broken, and the correct link is https://docs.llamaindex.ai/en/stable/module_guides/loading/documents_and_nodes/usage_documents/. They also note that the issue is limited to dated links and not everything is affected.
