[Bitrix\Main\DB\ConnectionException] 
Mysql connect error [localhost, 127.0.0.1]: No such file or directory (400)
/home/bitrix/www/bitrix/modules/main/lib/db/mysqlconnection.php:50
#0: Bitrix\Main\DB\MysqlConnection->connectInternal()
	/home/bitrix/www/bitrix/modules/main/lib/db/mysqlconnection.php:103
#1: Bitrix\Main\DB\MysqlConnection->queryInternal(string, array, NULL)
	/home/bitrix/www/bitrix/modules/main/lib/db/connection.php:329
#2: Bitrix\Main\DB\Connection->query(string)
	/home/bitrix/www/bitrix/modules/main/lib/entity/query.php:1924
#3: Bitrix\Main\Entity\Query->query(string)
	/home/bitrix/www/bitrix/modules/main/lib/entity/query.php:505
#4: Bitrix\Main\Entity\Query->exec()
	/home/bitrix/www/bitrix/modules/main/lib/entity/datamanager.php:256
#5: Bitrix\Main\Entity\DataManager::getList(array)
	/home/bitrix/www/bitrix/modules/socialservices/lib/ap.php:98
#6: Bitrix\Socialservices\ApTable::getConnection()
	/home/bitrix/www/bitrix/modules/b24connector/lib/connection.php:227
#7: Bitrix\B24Connector\Connection::getFields()
	/home/bitrix/www/bitrix/modules/b24connector/lib/helper.php:120
#8: Bitrix\B24Connector\Helper::onBeforeProlog()
	
#9: call_user_func_array(array, array)
	/home/bitrix/www/bitrix/modules/main/classes/general/module.php:490
#10: ExecuteModuleEventEx(array)
	/home/bitrix/www/bitrix/modules/main/include.php:547
#11: require_once(string)
	/home/bitrix/www/bitrix/modules/main/include/prolog_before.php:14
#12: require_once(string)
	/home/bitrix/www/bitrix/modules/main/include/prolog.php:10
#13: require_once(string)
	/home/bitrix/www/bitrix/header.php:1
#14: require(string)
	/home/bitrix/www/catalog/index.php:2
#15: include_once(string)
	/home/bitrix/www/bitrix/modules/main/include/urlrewrite.php:159
#16: include_once(string)
	/home/bitrix/www/bitrix/urlrewrite.php:2