pkg-rust-maintainers archive 2023-August is inaccessible

i.e. https://alioth-lists.debian.net/pipermail/pkg-rust-maintainers/2023-August/

The entire directory seems to be denied access, so none of the "View by" options, nor the "Gzip'd Text", is available in the archive list (https://alioth-lists.debian.net/pipermail/pkg-rust-maintainers/).