This wiki hasn't been used for years. 10 last edits go as far as 2.5 years back. Looking at logs, the most popular human activity appears to be random Wikimedians trying to login, failing and going away. I propose to close this wiki as it serves no purpose.
@jhsoby - Closure means that the wiki cannot be editted by regular users. In public wikis it means only Wikimedia stewards, sysadmins and staff. In private wikis this may differ as the permissions configurations do vary. You should check Special:ListGroupRights and see who has 'edit' permissions there.
The edit right is assigned to the group "Users", which means that nothing has really changed (since only that group could read and edit before this change). All the patch did in reality, then, was to put a strike through internal in Special:SiteMatrix …
Well...this is the configuration for wikis that are in closed.dblist.
// Read-only (except stewards) 'closed' => [ '*' => [ 'edit' => false, 'createaccount' => false, ], 'user' => [ 'edit' => false, 'move' => false, 'move-rootuserpages' => false, 'move-subpages' => false, 'upload' => false, ], 'autoconfirmed' => [ 'upload' => false, 'move' => false, ], 'sysop' => [ 'block' => false, 'delete' => false, 'undelete' => false, 'import' => false, 'move' => false, 'move-subpages' => false, 'move-rootuserpages' => false, 'patrol' => false, 'protect' => false, 'editprotected' => false, 'rollback' => false, 'trackback' => false, 'upload' => false, 'movefile' => false, ], 'steward' => [ 'edit' => true, 'move' => true, 'delete' => true, 'upload' => true, ], ],
I suspect the problem is that only one of the entries in groupOverrides matches. For internalwiki, private and closed can match, as internalwiki is in both private.dblist and closed.dblist, but apparently, only private matches, setting it as a private wiki, and the configuration for closed wikis is just ignored. Moving configuration for private to groupOverrides2 will probably solve this problem, however, I'm not sure if doing so won't break the default configuration there.