[Bitrix\Main\DB\ConnectionException] 
Mysql connect error [localhost]: (2002) No such file or directory (400)
/var/www/html/bitrix/modules/main/lib/db/mysqliconnection.php:65
#0: Bitrix\Main\DB\MysqliConnection->connectInternal()
	/var/www/html/bitrix/modules/main/lib/db/mysqliconnection.php:122
#1: Bitrix\Main\DB\MysqliConnection->queryInternal(string, array, NULL)
	/var/www/html/bitrix/modules/main/lib/db/connection.php:330
#2: Bitrix\Main\DB\Connection->query(string)
	/var/www/html/bitrix/modules/main/lib/orm/query/query.php:3209
#3: Bitrix\Main\ORM\Query\Query->query(string)
	/var/www/html/bitrix/modules/main/lib/orm/query/query.php:807
#4: Bitrix\Main\ORM\Query\Query->exec()
	/var/www/html/bitrix/modules/main/lib/orm/data/datamanager.php:500
#5: Bitrix\Main\ORM\Data\DataManager::getList(array)
	/var/www/html/bitrix/modules/alexkova.sale24/lib/core.php:182
#6: Alexkova\Sale24\Core->getRule()
	/var/www/html/bitrix/modules/alexkova.sale24/lib/core.php:147
#7: Alexkova\Sale24\Core->isSale24()
	/var/www/html/bitrix/modules/alexkova.sale24/lib/prolog.php:16
#8: Alexkova\Sale24\Prolog::init()
	/var/www/html/bitrix/modules/main/classes/general/module.php:490
#9: ExecuteModuleEventEx(array)
	/var/www/html/bitrix/modules/main/include.php:291
#10: require_once(string)
	/var/www/html/bitrix/modules/main/include/prolog_before.php:14
#11: require_once(string)
	/var/www/html/bitrix/modules/main/include/prolog.php:10
#12: require_once(string)
	/var/www/html/bitrix/header.php:1
#13: require(string)
	/var/www/html/catalog/index.php:2
#14: include_once(string)
	/var/www/html/bitrix/modules/main/include/urlrewrite.php:159
#15: include_once(string)
	/var/www/html/bitrix/urlrewrite.php:2