[Bitrix\Main\DB\ConnectionException] 
Mysql connect error [localhost]: (2002) Connection refused (400)
/var/www/ermak-ufa.ru/html/bitrix/modules/main/lib/db/mysqliconnection.php:65
#0: Bitrix\Main\DB\MysqliConnection->connectInternal()
	/var/www/ermak-ufa.ru/html/bitrix/modules/main/lib/db/mysqliconnection.php:122
#1: Bitrix\Main\DB\MysqliConnection->queryInternal(string, array, NULL)
	/var/www/ermak-ufa.ru/html/bitrix/modules/main/lib/db/connection.php:330
#2: Bitrix\Main\DB\Connection->query(string)
	/var/www/ermak-ufa.ru/html/bitrix/modules/artamonov.rest/lib/foundation/config.php:26
#3: Artamonov\Rest\Foundation\Config->get(string)
	/var/www/ermak-ufa.ru/html/bitrix/modules/artamonov.rest/lib/foundation/core.php:20
#4: Artamonov\Rest\Foundation\Core->run()
	/var/www/ermak-ufa.ru/html/bitrix/php_interface/init.php:13
#5: include_once(string)
	/var/www/ermak-ufa.ru/html/bitrix/modules/main/include.php:241
#6: require_once(string)
	/var/www/ermak-ufa.ru/html/bitrix/modules/main/include/prolog_before.php:14
#7: require_once(string)
	/var/www/ermak-ufa.ru/html/bitrix/modules/main/include/prolog.php:10
#8: require_once(string)
	/var/www/ermak-ufa.ru/html/bitrix/header.php:1
#9: require(string)
	/var/www/ermak-ufa.ru/html/catalog/index.php:2
#10: include_once(string)
	/var/www/ermak-ufa.ru/html/bitrix/modules/main/include/urlrewrite.php:159
#11: include_once(string)
	/var/www/ermak-ufa.ru/html/bitrix/urlrewrite.php:2