[Bitrix\Main\DB\ConnectionException] 
Mysql connect error [localhost]: (2002) Connection refused (400)
/home/bitrix/www/bitrix/modules/main/lib/db/mysqliconnection.php:65
#0: Bitrix\Main\DB\MysqliConnection->connectInternal()
	/home/bitrix/www/bitrix/modules/main/lib/db/mysqliconnection.php:122
#1: Bitrix\Main\DB\MysqliConnection->queryInternal(string, array, NULL)
	/home/bitrix/www/bitrix/modules/main/lib/db/connection.php:330
#2: Bitrix\Main\DB\Connection->query(string)
	/home/bitrix/www/bitrix/modules/main/lib/orm/query/query.php:3190
#3: Bitrix\Main\ORM\Query\Query->query(string)
	/home/bitrix/www/bitrix/modules/main/lib/orm/query/query.php:806
#4: Bitrix\Main\ORM\Query\Query->exec()
	/home/bitrix/www/local/modules/rusklimat.b2c/lib/helpers/iblock/iblockentity.php:1490
#5: Rusklimat\B2c\Helpers\Iblock\Iblockentity->getList(array, array, boolean, boolean, array, string)
	/home/bitrix/www/local/modules/rusklimat.b2c/lib/helpers/main/tools.php:164
#6: Rusklimat\B2c\Helpers\Main\Tools::pageIsCategoryUmnyyDom()
	/home/bitrix/www/bitrix/modules/carrotquest.marketing/lib/carrotevents.php:59
#7: CarrotQuest\Marketing\CarrotEvents::onPageStart()
	/home/bitrix/www/bitrix/modules/main/classes/general/module.php:490
#8: ExecuteModuleEventEx(array)
	/home/bitrix/www/bitrix/modules/main/include.php:284
#9: require_once(string)
	/home/bitrix/www/bitrix/modules/main/include/prolog_before.php:14
#10: require_once(string)
	/home/bitrix/www/bitrix/modules/main/include/prolog.php:10
#11: require_once(string)
	/home/bitrix/www/bitrix/header.php:1
#12: require(string)
	/home/bitrix/www/catalog.php:5
#13: include_once(string)
	/home/bitrix/www/bitrix/modules/main/include/urlrewrite.php:159
#14: include_once(string)
	/home/bitrix/www/bitrix/urlrewrite.php:2