For AI agents: the complete documentation index is available at https://mfeflow.github.io/mfeflow/llms.txt, the full documentation bundle is available at https://mfeflow.github.io/mfeflow/llms-full.txt, and this page is available as Markdown at https://mfeflow.github.io/mfeflow/errors/E401.md.
mfeflow

    MFEFLOW_E401

    Could not fetch from the registry.

    Fix

    Check the URL in "registries" and your network, then try again.