Read the official Contao announcements.
TYPOlight 2.5.7 is available
by Leo Feyer – Announcements
TYPOlight version 2.5.7 is available. The maintenance release adjusts the behaviour of the download(s) element and adds the option to recreate XML sitemaps in the maintenance module.
I apologize for releasing two updates in quick succession again (it is not an April Fool's joke). It is kind of difficult to check search engine related features in a local testing environment that is unreachable for the bots. To make amends, I have added two small but helpful features :-)
Download this release from github.com.