[Error] 
Call to undefined function mysqli_connect() (0)
/var/www/prod/bitrix/modules/main/classes/mysql/database_mysqli.php:31
#0: CDatabase->ConnectInternal
	/var/www/prod/bitrix/modules/main/classes/general/database.php:215
#1: CAllDatabase->DoConnect
	/var/www/prod/bitrix/modules/main/classes/mysql/database_mysqli.php:76
#2: CDatabase->ForSql
	/var/www/prod/bitrix/modules/main/classes/general/sqlwhere.php:702
#3: CAllSQLWhere->addStringFilter
	/var/www/prod/bitrix/modules/main/classes/general/sqlwhere.php:366
#4: CAllSQLWhere->GetQueryEx
	/var/www/prod/bitrix/modules/main/classes/general/sqlwhere.php:251
#5: CAllSQLWhere->GetQuery
	/var/www/prod/bitrix/modules/main/lib/orm/query/query.php:2215
#6: Bitrix\Main\ORM\Query\Query->buildWhere
	/var/www/prod/bitrix/modules/main/lib/orm/query/query.php:2445
#7: Bitrix\Main\ORM\Query\Query->buildQuery
	/var/www/prod/bitrix/modules/main/lib/orm/query/query.php:930
#8: Bitrix\Main\ORM\Query\Query->exec
	/var/www/prod/bitrix/modules/main/lib/orm/data/datamanager.php:500
#9: Bitrix\Main\ORM\Data\DataManager::getList
	/var/www/prod/bitrix/modules/abtest/lib/helper.php:39
#10: Bitrix\ABTest\Helper::getActiveTest
	/var/www/prod/bitrix/modules/abtest/lib/helper.php:126
#11: Bitrix\ABTest\Helper::getContext
	/var/www/prod/bitrix/modules/abtest/lib/eventhandler.php:37
#12: Bitrix\ABTest\EventHandler::onGetCurrentSiteTemplate
	
#13: call_user_func_array
	/var/www/prod/bitrix/modules/main/lib/eventmanager.php:435
#14: Bitrix\Main\EventManager->sendToEventHandler
	/var/www/prod/bitrix/modules/main/lib/eventmanager.php:371
#15: Bitrix\Main\EventManager->send
	/var/www/prod/bitrix/modules/main/lib/event.php:142
#16: Bitrix\Main\Event->send
	/var/www/prod/bitrix/modules/main/classes/general/main.php:4548
#17: CAllSite::GetCurTemplate
	/var/www/prod/bitrix/modules/main/include.php:434
#18: require_once(string)
	/var/www/prod/bitrix/modules/main/include/prolog_before.php:14
#19: require_once(string)
	/var/www/prod/bitrix/modules/main/include/prolog.php:10
#20: require_once(string)
	/var/www/prod/bitrix/header.php:1
#21: require(string)
	/var/www/prod/index.php:20
#22: include_once(string)
	/var/www/prod/bitrix/modules/main/include/urlrewrite.php:159
#23: include_once(string)
	/var/www/prod/bitrix/urlrewrite.php:53