Invalid internationalization middleware configuration

import DontEditWarning from '~/components/DontEditWarning.astro'

<DontEditWarning />

InvalidI18nMiddlewareConfiguration: The option redirectToDefaultLocale can be enabled only when prefixDefaultLocale is also set to true; otherwise, redirects might cause infinite loops. Enable the option prefixDefaultLocale to continue to use redirectToDefaultLocale, or ensure both are set to false.

What went wrong?

An invalid i18n middleware configuration was detected.