MediaWiki internal error.

Original exception: exception 'ErrorPageError' with message 'Запрашиваемое название статьи неправильно, пусто, либо неправильно указано межъязыковое или интервики название. Возможно, в названии используются недопустимые символы.' in /fs/www/automata/html/includes/Wiki.php:152
Stack trace:
#0 /fs/www/automata/html/includes/Wiki.php(45): MediaWiki->initializeSpecialCases(Object(Title), Object(OutputPage), Object(WebRequest))
#1 /fs/www/automata/html/index.php(89): MediaWiki->initialize(Object(Title), Object(OutputPage), Object(User), Object(WebRequest))
#2 {main}

Exception caught inside exception handler: exception 'DBQueryError' with message 'A database error has occurred
Query: SELECT page_id FROM `page` WHERE page_namespace = '0' AND page_title = 'Заглавная_страница' LIMIT 1
Function: LinkCache::addLinkObj
Error: 1267 Illegal mix of collations (latin1_bin,IMPLICIT) and (utf8mb4_general_ci,COERCIBLE) for operation '=' (localhost)
' in /fs/www/automata/html/includes/Database.php:824
Stack trace:
#0 /fs/www/automata/html/includes/Database.php(779): Database->reportQueryError('Illegal mix of ...', 1267, ' SELECT page_i...', 'LinkCache::addL...', false)
#1 /fs/www/automata/html/includes/Database.php(1224): Database->query(' SELECT page_i...', 'LinkCache::addL...')
#2 /fs/www/automata/html/includes/Database.php(1104): Database->select('page', 'page_id', Array, 'LinkCache::addL...', Array)
#3 /fs/www/automata/html/includes/LinkCache.php(146): Database->selectField('page', 'page_id', Array, 'LinkCache::addL...', Array)
#4 /fs/www/automata/html/includes/Title.php(1655): LinkCache->addLinkObj(Object(Title))
#5 /fs/www/automata/html/includes/Linker.php(241): Title->getArticleID()
#6 /fs/www/automata/html/includes/OutputPage.php(1130): Linker->makeLinkObj(Object(Title))
#7 /fs/www/automata/html/includes/OutputPage.php(1161): OutputPage->addReturnTo(Object(Title))
#8 /fs/www/automata/html/includes/OutputPage.php(829): OutputPage->returnToMain(false)
#9 [internal function]: OutputPage->showErrorPage('badtitle', 'badtitletext')
#10 /fs/www/automata/html/includes/StubObject.php(32): call_user_func_array(Array, Array)
#11 /fs/www/automata/html/includes/StubObject.php(40): StubObject->_call('showErrorPage', Array)
#12 /fs/www/automata/html/includes/Exception.php(173): StubObject->__call('showErrorPage', Array)
#13 /fs/www/automata/html/includes/Exception.php(173): StubObject->showErrorPage('badtitle', 'badtitletext')
#14 /fs/www/automata/html/includes/Exception.php(191): ErrorPageError->report()
#15 /fs/www/automata/html/includes/Exception.php(225): wfReportException(Object(ErrorPageError))
#16 [internal function]: wfExceptionHandler(Object(ErrorPageError))
#17 {main}