NextJS runtime v5 not copying files to functions

I have the following lines in my netlify.toml

[functions]
  included_files = ["next-i18next.config.cjs"]

But this is logged in the getServerSideProps of my page:

Error: next-i18next was unable to find a user config at /var/task/apps/<app-name>/next-i18next.config.cjs

Previously the config file worked directly.

This seems to be ongoing in the helpdesk.