Project pages on several projects are inaccessible because spaces are in wgMetaNamespace.
A space was also found in wgMetaNamespaceTalk for aswikisource. It is not clear whether that is currently having any effect on that wiki.
I am clicking on some of the links in https://ur.wikiquote.org/wiki/خاص:شراکتیں/MediaWiki_message_delivery (that appear to go to the Wikiquote: namespace) but I just get the message indicating that the page does not exist. It appears that the namespace may be broken.
I wonder if something when implementing T214290.
Some more details
It appears all history pages of project namespace are inaccessible.
Got to https://ur.wikiquote.org/w/index.php?title=%D9%88%DB%8C%DA%A9%DB%8C_%D8%A7%D9%82%D8%AA%D8%A8%D8%A7%D8%B3:Community_Portal&action=history&uselang=en which is supposed to be the history page of the project page "Community Portal:ویکی اقتباس"
The history page is displayed.
Error message says "There is no edit history for this page." but that cannot be true, as several revisions are viewable via diff page like this edit.