[Bitrix\Main\DB\ConnectionException] 
Mysql connect error [localhost]: (2002) Connection refused (400)
/home/bitrix/ext_www/bfla.eu/bitrix/modules/main/lib/db/mysqliconnection.php:82
#0: Bitrix\Main\DB\MysqliConnection->connectInternal()
	/home/bitrix/ext_www/bfla.eu/bitrix/modules/main/lib/data/connection.php:53
#1: Bitrix\Main\Data\Connection->getResource()
	/home/bitrix/ext_www/bfla.eu/bitrix/modules/main/lib/db/mysqlisqlhelper.php:21
#2: Bitrix\Main\DB\MysqliSqlHelper->forSql(string)
	/home/bitrix/ext_www/bfla.eu/bitrix/modules/main/lib/config/option.php:193
#3: Bitrix\Main\Config\Option::load(string)
	/home/bitrix/ext_www/bfla.eu/bitrix/modules/main/lib/config/option.php:38
#4: Bitrix\Main\Config\Option::get(string, string, string, boolean)
	/home/bitrix/ext_www/bfla.eu/bitrix/modules/main/classes/general/option.php:25
#5: CAllOption::GetOptionString(string, string, string)
	/home/bitrix/ext_www/bfla.eu/bitrix/modules/sale/affiliate.php:2
#6: include_once(string)
	/home/bitrix/ext_www/bfla.eu/bitrix/modules/main/classes/general/module.php:443
#7: ExecuteModuleEventEx(array)
	/home/bitrix/ext_www/bfla.eu/bitrix/modules/main/include.php:458
#8: require_once(string)
	/home/bitrix/ext_www/bfla.eu/bitrix/modules/main/include/prolog_before.php:14
#9: require_once(string)
	/home/bitrix/ext_www/bfla.eu/bitrix/modules/main/include/prolog.php:10
#10: require_once(string)
	/home/bitrix/ext_www/bfla.eu/bitrix/header.php:1
#11: require(string)
	/home/bitrix/ext_www/bfla.eu/index.php:2