Error in databases vps

Good afternoon. The vps server gives an error after a power outage:

[BitrixMainDBConnectionException] Mysql connect error [localhost]: (2002) Connection refused (400) /home/bitrix/www/bitrix/modules/main/lib/db/mysqliconnection.php:65 #0: BitrixMainDBMysqliConnection->connectInternal() /home/bitrix/www/bitrix/modules/main/lib/data/connection.php:53 #1: BitrixMainDataConnection->getResource() /home/bitrix/www/bitrix/modules/main/lib/db/mysqlisqlhelper.php:21 #2: BitrixMainDBMysqliSqlHelper->forSql(string) /home/bitrix/www/bitrix/modules/main/lib/config/option.php:193 #3: BitrixMainConfigOption::load(string) /home/bitrix/www/bitrix/modules/main/lib/config/option.php:38 #4: BitrixMainConfigOption::get(string, string, string) /home/bitrix/www/bitrix/modules/main/lib/httprequest.php:392 #5: BitrixMainHttpRequest->prepareCookie(array) /home/bitrix/www/bitrix/modules/main/lib/httprequest.php:69 #6: BitrixMainHttpRequest->__construct(object, array, array, array, array) /home/bitrix/www/bitrix/modules/main/lib/httpapplication.php:46 #7: BitrixMainHttpApplication->initializeContext(array) /home/bitrix/www/bitrix/modules/main/lib/application.php:122 #8: BitrixMainApplication->initializeExtendedKernel(array) /home/bitrix/www/bitrix/modules/main/include.php:22 #9: require_once(string) /home/bitrix/www/bitrix/modules/main/include/prolog_before.php:14 #10: require_once(string) /home/bitrix/www/bitrix/modules/main/include/prolog.php:10 #11: require_once(string) /home/bitrix/www/bitrix/header.php:1 #12: require(string) /home/bitrix/www/EN/index.php:1

Domain: