As a 2019 steward I have access to those closed wikis where I have an account since before the wiki was closed (for me e.g. wikimania2014wiki), but when I attempt to log into a wiki where I didn't have one I get "Auto-creation of a local account failed: Automatic account creation is not allowed." (for me it is e.g. wikimania2010wiki or gotwikibooks).
Please ensure that all existing stewards have accounts in all closed wikis.
Judging from wm2005 log something like this was previously done on 17 May 2013.