It's been true for several days, but ...
Attempting to edit an existing page results in a traceback.
```[98fedcb8f435b46ad5d64ace] /w/index.php?title=List_of_wikis&action=edit
Error from line 1151 of /var/www/live/w/includes/EditPage.php: Call to a member function getModel() on null
Backtrace:
#0 /var/www/live/w/includes/EditPage.php(691): EditPage->initialiseForm()
#1 /var/www/live/w/includes/actions/EditAction.php(55): EditPage->edit()
#2 /var/www/live/w/includes/MediaWiki.php(511): EditAction->show()
#3 /var/www/live/w/includes/MediaWiki.php(302): MediaWiki->performAction(Article, Title)
#4 /var/www/live/w/includes/MediaWiki.php(854): MediaWiki->performRequest()
#5 /var/www/live/w/includes/MediaWiki.php(527): MediaWiki->main()
#6 /var/www/live/w/index.php(44): MediaWiki->run()
#7 {main}```
It appears to be possible to create new pages, however.