https://lists.freebsd.org/pipermail/freebsd-pkg-fallout/ doesn't have archives for Monday 14 October 2019 or later. The last entry is from "Sat Oct 12 21:52:05 UTC 2019". While one could look at pkg-status for build errors instead the logs sometimes disappear if machines are turned off or repurposed.
Look towards the bottom of the page.
We changed archiving for pkg-fallout@ to keep daily archives rather than weekly archives in October. The sorting on the pipermail archive page is a bit silly.
The reason we changed the archiving to daily instead of weekly is that pipermail reads the entire current archive before appending a new message. Towards the end of the week, that causes a lot of memory pressure and slows down archiving and delivery for all other lists.
This is still not an ideal solution, but it's the best we can do without keeping local patches against Mailman.
See for example: https://lists.freebsd.org/pipermail/freebsd-pkg-fallout/20191215/thread.html
You may also find the archives on https://docs.freebsd.org/mail/current/freebsd-pkg-fallout.html easier to follow.