Внутренняя ошибка

[402b572f95056e857f560006] /%D0%A1%D0%BB%D1%83%D0%B6%D0%B5%D0%B1%D0%BD%D0%B0%D1%8F:%D0%9E%D1%87%D0%BA%D0%B8_%D0%B2%D0%BA%D0%BB%D0%B0%D0%B4%D0%B0 Error: Call to undefined method Wikimedia\Rdbms\DatabaseMysqli::freeResult()

Backtrace:

from /var/www/www-root/data/www/ru.davedka.com/includes/libs/rdbms/database/DBConnRef.php(103)
#0 /var/www/www-root/data/www/ru.davedka.com/extensions/ContributionScores/ContributionScores_body.php(201): Wikimedia\Rdbms\DBConnRef->__call(string, array)
#1 /var/www/www-root/data/www/ru.davedka.com/extensions/ContributionScores/ContributionScores_body.php(315): ContributionScores->genContributionScoreTable(integer, integer)
#2 /var/www/www-root/data/www/ru.davedka.com/extensions/ContributionScores/ContributionScores_body.php(230): ContributionScores->showPage()
#3 /var/www/www-root/data/www/ru.davedka.com/includes/specialpage/SpecialPage.php(701): ContributionScores->execute(NULL)
#4 /var/www/www-root/data/www/ru.davedka.com/includes/specialpage/SpecialPageFactory.php(1428): SpecialPage->run(NULL)
#5 /var/www/www-root/data/www/ru.davedka.com/includes/MediaWiki.php(316): MediaWiki\SpecialPage\SpecialPageFactory->executePath(string, RequestContext)
#6 /var/www/www-root/data/www/ru.davedka.com/includes/MediaWiki.php(904): MediaWiki->performRequest()
#7 /var/www/www-root/data/www/ru.davedka.com/includes/MediaWiki.php(562): MediaWiki->main()
#8 /var/www/www-root/data/www/ru.davedka.com/index.php(50): MediaWiki->run()
#9 /var/www/www-root/data/www/ru.davedka.com/index.php(46): wfIndexMain()
#10 {main}