[Bitrix\Main\DB\ConnectionException] 
Mysql connect error [localhost]: (2002) Connection refused (400)
/var/www/clients/client0/web4/web/bitrix/modules/main/lib/db/mysqliconnection.php:65
#0: Bitrix\Main\DB\MysqliConnection->connectInternal()
	/var/www/clients/client0/web4/web/bitrix/modules/main/lib/db/mysqliconnection.php:122
#1: Bitrix\Main\DB\MysqliConnection->queryInternal(string, array, NULL)
	/var/www/clients/client0/web4/web/bitrix/modules/main/lib/db/connection.php:330
#2: Bitrix\Main\DB\Connection->query(string)
	/var/www/clients/client0/web4/web/bitrix/modules/main/lib/orm/query/query.php:3304
#3: Bitrix\Main\ORM\Query\Query->query(string)
	/var/www/clients/client0/web4/web/bitrix/modules/main/lib/orm/query/query.php:816
#4: Bitrix\Main\ORM\Query\Query->exec()
	/var/www/clients/client0/web4/web/bitrix/modules/main/lib/orm/data/datamanager.php:500
#5: Bitrix\Main\ORM\Data\DataManager::getList(array)
	/var/www/clients/client0/web4/web/bitrix/modules/main/lib/orm/data/datamanager.php:361
#6: Bitrix\Main\ORM\Data\DataManager::getByPrimary(array, array)
	/var/www/clients/client0/web4/web/bitrix/modules/main/include.php:69
#7: require_once(string)
	/var/www/clients/client0/web4/web/bitrix/modules/main/include/prolog_before.php:14
#8: require_once(string)
	/var/www/clients/client0/web4/web/bitrix/modules/main/include/prolog.php:10
#9: require_once(string)
	/var/www/clients/client0/web4/web/bitrix/header.php:1
#10: require(string)
	/var/www/clients/client0/web4/web/en/ideas/index.php:2
#11: include_once(string)
	/var/www/clients/client0/web4/web/bitrix/modules/main/include/urlrewrite.php:162
#12: include_once(string)
	/var/www/clients/client0/web4/web/bitrix/urlrewrite.php:2