With AccessControl extension, Special:Version yields:
```
/index.php/Special:Version MWException from line 121 of includes/page/WikiPage.php: Invalid or virtual namespace -1 given.
Backtrace:
#0 extensions/AccessControl/AccessControl.hooks.php(86): WikiPage::factory(Title)
#1 extensions/AccessControl/AccessControl.hooks.php(294): AccessControlHooks::getContentPage(integer, string)
#2 includes/Hooks.php(177): AccessControlHooks::onUserCan(Title, User, string, string)
#3 includes/Hooks.php(205): Hooks::callHook(string, array, array, NULL)
#4 includes/Title.php(2269): Hooks::run(string, array)
#5 includes/Title.php(2734): Title->checkPermissionHooks(string, User, array, string, boolean)
#6 includes/Title.php(2135): Title->getUserPermissionsErrorsInternal(string, User, string)
#7 includes/MediaWiki.php(207): Title->getUserPermissionsErrors(string, User)
#8 includes/MediaWiki.php(863): MediaWiki->performRequest()
#9 includes/MediaWiki.php(524): MediaWiki->main()
#10 index.php(42): MediaWiki->run()
#11 {main}
```
Or in short, it does not support Special pages which have namespace value of `-1` (NS_SPECIAL).