The 1.36.0-wmf.9 version of MediaWiki is blocked[0].
The new version is deployed to nowhere at all, including not even on testwikis, but can proceed no further until these issues are resolved:
* T262900 Rebuilding l10n cache fails for train - https://phabricator.wikimedia.org/T262900
Once this issue is resolved train can get moving at all.
Thank you for your help resolving these issues!
-- Your humble train toiler
[0]. https://phabricator.wikimedia.org/T257977 [1]. https://versions.toolforge.org/
wikitech-l@lists.wikimedia.org