[Bitrix\Main\DB\ConnectionException] 
Mysql connect error [localhost]: (2006) MySQL server has gone away (400)
/var/www/www-root/data/www/xn----8sbanaczarc8adjdrgfn0i6g.xn--p1ai/bitrix/modules/main/lib/db/mysqliconnection.php:65
#0: Bitrix\Main\DB\MysqliConnection->connectInternal()
	/var/www/www-root/data/www/xn----8sbanaczarc8adjdrgfn0i6g.xn--p1ai/bitrix/modules/main/lib/data/connection.php:53
#1: Bitrix\Main\Data\Connection->getResource()
	/var/www/www-root/data/www/xn----8sbanaczarc8adjdrgfn0i6g.xn--p1ai/bitrix/modules/main/lib/db/mysqlisqlhelper.php:21
#2: Bitrix\Main\DB\MysqliSqlHelper->forSql(string)
	/var/www/www-root/data/www/xn----8sbanaczarc8adjdrgfn0i6g.xn--p1ai/bitrix/modules/main/lib/config/option.php:193
#3: Bitrix\Main\Config\Option::load(string)
	/var/www/www-root/data/www/xn----8sbanaczarc8adjdrgfn0i6g.xn--p1ai/bitrix/modules/main/lib/config/option.php:149
#4: Bitrix\Main\Config\Option::getForModule(string)
	/var/www/www-root/data/www/xn----8sbanaczarc8adjdrgfn0i6g.xn--p1ai/bitrix/modules/dev2fun.multidomain/classes/general/Config.php:33
#5: Dev2fun\MultiDomain\Config->init()
	/var/www/www-root/data/www/xn----8sbanaczarc8adjdrgfn0i6g.xn--p1ai/bitrix/modules/dev2fun.multidomain/classes/general/Config.php:27
#6: Dev2fun\MultiDomain\Config::getInstance()
	/var/www/www-root/data/www/xn----8sbanaczarc8adjdrgfn0i6g.xn--p1ai/bitrix/modules/dev2fun.multidomain/include.php:47
#7: Dev2fun\MultiDomain\Base::InitDomains()
	/var/www/www-root/data/www/xn----8sbanaczarc8adjdrgfn0i6g.xn--p1ai/bitrix/modules/main/classes/general/module.php:480
#8: ExecuteModuleEventEx(array)
	/var/www/www-root/data/www/xn----8sbanaczarc8adjdrgfn0i6g.xn--p1ai/bitrix/modules/main/include.php:292
#9: require_once(string)
	/var/www/www-root/data/www/xn----8sbanaczarc8adjdrgfn0i6g.xn--p1ai/bitrix/modules/main/include/prolog_before.php:14
#10: require_once(string)
	/var/www/www-root/data/www/xn----8sbanaczarc8adjdrgfn0i6g.xn--p1ai/bitrix/modules/main/include/prolog.php:10
#11: require_once(string)
	/var/www/www-root/data/www/xn----8sbanaczarc8adjdrgfn0i6g.xn--p1ai/bitrix/header.php:1
#12: require(string)
	/var/www/www-root/data/www/willan.ru/novostroyki/kvartiry/index.php:2
#13: include_once(string)
	/var/www/www-root/data/www/xn----8sbanaczarc8adjdrgfn0i6g.xn--p1ai/bitrix/modules/main/include/urlrewrite.php:159
#14: include_once(string)
	/var/www/www-root/data/www/xn----8sbanaczarc8adjdrgfn0i6g.xn--p1ai/bitrix/urlrewrite.php:2