The 1.39.0-wmf.8 version of MediaWiki is blocked[0].

The new version is deployed to testwikis[1], but can proceed no
further until these issues are resolved:

* Fatal exception of type "UnexpectedValueException" when attempting
  to block - https://phabricator.wikimedia.org/T305786
* Templates get transcluded in (un)delete reason for associated talk \
  page - https://phabricator.wikimedia.org/T306431

Once these issues are resolved, train can resume. If these issues are
resolved on a Friday the train will resume Monday.

Thank you for your help resolving these issues!

-- Your humble train toiler

[0]. <https://phabricator.wikimedia.org/T305214>
[1]. <https://versions.toolforge.org/>