The Wordpress update shows ‘file not found’ when clicking the update on all our sites.
Downloading and then installing (overwrite, replace) works.
So the link for auto-update seems wrong.
This concerns updating from 2.8.13 to 2.8.14.
The cached update data on your site is probably persisting longer than the download URLs are valid for. Try clearing any caches your site might be using, then go to the Forms > System Status > Updates page. That will force the latest update data to be retrieved.