The 1.34.0-wmf.16 version of MediaWiki is blocked[0].
The new version can't proceed to group1[1] until these issues are resolved:
* Disable grouped results on RecentChanges page on mobile - https://phabricator.wikimedia.org/T228280
* Inform AMC users that grouped results are not available on the recent changes page - https://phabricator.wikimedia.org/T228516
Once these issues are resolved, the 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 unassuming train minion
[0]. https://phabricator.wikimedia.org/T220741 [1]. https://tools.wmflabs.org/versions/