[Bitrix\Main\DB\ConnectionException] 
Mysql connect error [localhost]: (2002) Connection refused (400)
/var/www/clients/client0/web1/web/bitrix/modules/main/lib/db/mysqliconnection.php:65
#0: Bitrix\Main\DB\MysqliConnection->connectInternal
	/var/www/clients/client0/web1/web/bitrix/modules/main/lib/db/mysqliconnection.php:122
#1: Bitrix\Main\DB\MysqliConnection->queryInternal
	/var/www/clients/client0/web1/web/bitrix/modules/main/lib/db/connection.php:330
#2: Bitrix\Main\DB\Connection->query
	/var/www/clients/client0/web1/web/bitrix/modules/main/lib/orm/query/query.php:3304
#3: Bitrix\Main\ORM\Query\Query->query
	/var/www/clients/client0/web1/web/bitrix/modules/main/lib/orm/query/query.php:816
#4: Bitrix\Main\ORM\Query\Query->exec
	/var/www/clients/client0/web1/web/bitrix/modules/main/lib/orm/data/datamanager.php:500
#5: Bitrix\Main\ORM\Data\DataManager::getList
	/var/www/clients/client0/web1/web/bitrix/modules/main/lib/orm/data/datamanager.php:361
#6: Bitrix\Main\ORM\Data\DataManager::getByPrimary
	/var/www/clients/client0/web1/web/bitrix/modules/main/lib/orm/data/datamanager.php:376
#7: Bitrix\Main\ORM\Data\DataManager::getById
	/var/www/clients/client0/web1/web/bitrix/modules/highloadblock/classes/general/cusertypehlblock.php:197
#8: CUserTypeHlblock::getEntityReferences
	/var/www/clients/client0/web1/web/bitrix/modules/main/classes/general/usertype.php:3113
#9: CUserTypeManager->getEntityReferences
	/var/www/clients/client0/web1/web/bitrix/modules/main/lib/userfield.php:322
#10: Bitrix\Main\UserFieldTable::createUtsEntity
	/var/www/clients/client0/web1/web/bitrix/modules/main/lib/userfield.php:181
#11: Bitrix\Main\UserFieldTable::attachFields
	/var/www/clients/client0/web1/web/bitrix/modules/main/lib/orm/entity.php:309
#12: Bitrix\Main\ORM\Entity->postInitialize
	/var/www/clients/client0/web1/web/bitrix/modules/main/lib/orm/entity.php:121
#13: Bitrix\Main\ORM\Entity::getInstanceDirect
	/var/www/clients/client0/web1/web/bitrix/modules/main/lib/orm/entity.php:104
#14: Bitrix\Main\ORM\Entity::getInstance
	/var/www/clients/client0/web1/web/bitrix/modules/main/lib/orm/data/datamanager.php:81
#15: Bitrix\Main\ORM\Data\DataManager::getEntity
	/var/www/clients/client0/web1/web/local/core/classes/core/events.php:24
#16: Andre\Core\Events::register
	/var/www/clients/client0/web1/web/local/core/init.php:17
#17: require_once(string)
	/var/www/clients/client0/web1/web/bitrix/php_interface/init.php:2
#18: include_once(string)
	/var/www/clients/client0/web1/web/bitrix/modules/main/include.php:241
#19: require_once(string)
	/var/www/clients/client0/web1/web/bitrix/modules/main/include/prolog_before.php:14
#20: require_once(string)
	/var/www/clients/client0/web1/web/bitrix/modules/main/include/prolog.php:10
#21: require_once(string)
	/var/www/clients/client0/web1/web/bitrix/header.php:1
#22: require(string)
	/var/www/clients/client0/web1/web/catalog/index.php:1
#23: include_once(string)
	/var/www/clients/client0/web1/web/bitrix/modules/main/include/urlrewrite.php:159
#24: include_once(string)
	/var/www/clients/client0/web1/web/bitrix/urlrewrite.php:2