**Description**
If a CheckUser tries to access the "Special:Contributions" page to see contribution of an IP on the Russian Wikipedia, an error message is displayed.
**How to reproduce**
For example, if a CheckUser clicks on the following link: https://ru.wikipedia.org/wiki/Special:Contributions/212.74.203.83 an error message e.g. "**[446c004b-6c34-4901-89da-84c3b5ecd4bd] 2025-12-18 22:24:43: Неустранимое исключение типа «BadMethodCallException»**" will be displayed (see the first screenshot).
{F71130246}
Using an account without CheckUser right (or without logging in at all) will get the following correctly displayed page with the IP's contribution (see the second screenshot).
{F71130245}
**Additional information**
This issue is quite new - it has appeared just a couple of hours ago.
It looks like only the accounts of CheckUsers are affected by this issue. Perhaps the issue is somehow tied to the "global-temporary-account-viewer" right.
I was able to reproduce the issue from my main account **User:Q-bit array** on the Russian Wikipedia using different browsers (Chrome, Firefox) and from different devices (desktop + mobile). Also tried to clean the browser's cache and delete all cookies. Another CheckUsers of the Russian Wikipedia are also affected.
**I've decided to create a security task because it is a blocking issue for all CheckUsers of the Russian Wikipedia and we don't want that our LTAs know that the CUs can't work properly because of it!**
```
BadMethodCallException: MediaWiki\User\TempUser\RealTempUserConfig::getMatchCondition is disabled
from /srv/mediawiki/php-1.46.0-wmf.7/includes/User/TempUser/RealTempUserConfig.php(197)
#0 /srv/mediawiki/php-1.46.0-wmf.7/extensions/CheckUser/src/Services/CheckUserTemporaryAccountsByIPLookup.php(146): MediaWiki\User\TempUser\RealTempUserConfig->getMatchCondition(Wikimedia\Rdbms\DBConnRef, string, string)
#1 /srv/mediawiki/php-1.46.0-wmf.7/extensions/CheckUser/src/Services/CheckUserTemporaryAccountsByIPLookup.php(94): MediaWiki\CheckUser\Services\CheckUserTemporaryAccountsByIPLookup->getTempAccountsFromIPAddress(string, int)
#2 /srv/mediawiki/php-1.46.0-wmf.7/extensions/CheckUser/src/HookHandler/SpecialContributionsBeforeMainOutputHandler.php(102): MediaWiki\CheckUser\Services\CheckUserTemporaryAccountsByIPLookup->get(string, MediaWiki\User\User, bool, int)
#3 /srv/mediawiki/php-1.46.0-wmf.7/extensions/CheckUser/src/HookHandler/SpecialContributionsBeforeMainOutputHandler.php(40): MediaWiki\CheckUser\HookHandler\SpecialContributionsBeforeMainOutputHandler->addCountFromThisIPSubtitle(string, MediaWiki\Specials\SpecialContributions)
#4 /srv/mediawiki/php-1.46.0-wmf.7/includes/HookContainer/HookContainer.php(134): MediaWiki\CheckUser\HookHandler\SpecialContributionsBeforeMainOutputHandler->onSpecialContributionsBeforeMainOutput(int, MediaWiki\User\User, MediaWiki\Specials\SpecialContributions)
#5 /srv/mediawiki/php-1.46.0-wmf.7/includes/HookContainer/HookRunner.php(4114): MediaWiki\HookContainer\HookContainer->run(string, array)
#6 /srv/mediawiki/php-1.46.0-wmf.7/includes/SpecialPage/ContributionsSpecialPage.php(327): MediaWiki\HookContainer\HookRunner->onSpecialContributionsBeforeMainOutput(int, MediaWiki\User\User, MediaWiki\Specials\SpecialContributions)
#7 /srv/mediawiki/php-1.46.0-wmf.7/includes/SpecialPage/SpecialPage.php(711): MediaWiki\SpecialPage\ContributionsSpecialPage->execute(string)
#8 /srv/mediawiki/php-1.46.0-wmf.7/includes/SpecialPage/SpecialPageFactory.php(1744): MediaWiki\SpecialPage\SpecialPage->run(string)
#9 /srv/mediawiki/php-1.46.0-wmf.7/includes/Actions/ActionEntryPoint.php(504): MediaWiki\SpecialPage\SpecialPageFactory->executePath(string, MediaWiki\Context\RequestContext)
#10 /srv/mediawiki/php-1.46.0-wmf.7/includes/Actions/ActionEntryPoint.php(144): MediaWiki\Actions\ActionEntryPoint->performRequest()
#11 /srv/mediawiki/php-1.46.0-wmf.7/includes/MediaWikiEntryPoint.php(181): MediaWiki\Actions\ActionEntryPoint->execute()
#12 /srv/mediawiki/php-1.46.0-wmf.7/index.php(44): MediaWiki\MediaWikiEntryPoint->run()
#13 /srv/mediawiki/w/index.php(3): require(string)
#14 {main}
```