[Bitrix\Main\DB\ConnectionException] 
Mysql connect error [localhost]: (2002) Connection refused (400)
/home/bitrix/ext_www/shops.upravdom.com/bitrix/modules/main/lib/db/mysqliconnection.php:65
#0: Bitrix\Main\DB\MysqliConnection->connectInternal()
	/home/bitrix/ext_www/shops.upravdom.com/bitrix/modules/main/lib/db/mysqliconnection.php:122
#1: Bitrix\Main\DB\MysqliConnection->queryInternal(string, array, NULL)
	/home/bitrix/ext_www/shops.upravdom.com/bitrix/modules/main/lib/db/connection.php:330
#2: Bitrix\Main\DB\Connection->query(string)
	/home/bitrix/ext_www/shops.upravdom.com/bitrix/modules/main/lib/entity/query.php:3038
#3: Bitrix\Main\Entity\Query->query(string)
	/home/bitrix/ext_www/shops.upravdom.com/bitrix/modules/main/lib/entity/query.php:797
#4: Bitrix\Main\Entity\Query->exec()
	/home/bitrix/ext_www/shops.upravdom.com/bitrix/modules/main/lib/entity/datamanager.php:290
#5: Bitrix\Main\Entity\DataManager::getList(array)
	/home/bitrix/ext_www/shops.upravdom.com/bitrix/modules/main/lib/entity/datamanager.php:151
#6: Bitrix\Main\Entity\DataManager::getByPrimary(array)
	/home/bitrix/ext_www/shops.upravdom.com/bitrix/modules/main/lib/entity/datamanager.php:166
#7: Bitrix\Main\Entity\DataManager::getById(integer)
	/home/bitrix/ext_www/shops.upravdom.com/bitrix/modules/highloadblock/classes/general/cusertypehlblock.php:192
#8: CUserTypeHlblock::getEntityReferences(array, object)
	/home/bitrix/ext_www/shops.upravdom.com/bitrix/modules/main/classes/general/usertype.php:3005
#9: CUserTypeManager->getEntityReferences(array, object)
	/home/bitrix/ext_www/shops.upravdom.com/bitrix/modules/highloadblock/lib/highloadblock.php:414
#10: Bitrix\Highloadblock\HighloadBlockTable::compileEntity(array)
	/home/bitrix/ext_www/shops.upravdom.com/local/php_interface/classes/Config.php:53
#11: Upravdom\Config::setDomainInfo()
	/home/bitrix/ext_www/shops.upravdom.com/local/php_interface/classes/Config.php:19
#12: Upravdom\Config::init()
	/home/bitrix/ext_www/shops.upravdom.com/local/php_interface/init.php:9
#13: include_once(string)
	/home/bitrix/ext_www/shops.upravdom.com/bitrix/modules/main/include.php:234
#14: require_once(string)
	/home/bitrix/ext_www/shops.upravdom.com/bitrix/modules/main/include/prolog_before.php:14
#15: require_once(string)
	/home/bitrix/ext_www/shops.upravdom.com/bitrix/modules/main/include/prolog.php:10
#16: require_once(string)
	/home/bitrix/ext_www/shops.upravdom.com/bitrix/header.php:1
#17: require(string)
	/home/bitrix/ext_www/shops.upravdom.com/catalog/index.php:1
#18: include_once(string)
	/home/bitrix/ext_www/shops.upravdom.com/bitrix/modules/main/include/urlrewrite.php:159
#19: include_once(string)
	/home/bitrix/ext_www/shops.upravdom.com/bitrix/urlrewrite.php:2