[Bitrix\Main\DB\ConnectionException] 
Mysql connect error [khomus.mysql, 127.0.0.1] (400)
/home/khomus/khomus.nichost.ru/docs/bitrix/modules/main/lib/db/mysqlconnection.php:50
#0: Bitrix\Main\DB\MysqlConnection->connectInternal()
	/home/khomus/khomus.nichost.ru/docs/bitrix/modules/main/lib/db/mysqlconnection.php:103
#1: Bitrix\Main\DB\MysqlConnection->queryInternal(string, NULL, NULL)
	/home/khomus/khomus.nichost.ru/docs/bitrix/modules/main/lib/db/connection.php:330
#2: Bitrix\Main\DB\Connection->query(string, NULL, integer, integer)
	/home/khomus/khomus.nichost.ru/docs/bitrix/modules/main/lib/db/connection.php:358
#3: Bitrix\Main\DB\Connection->queryScalar(string)
	/home/khomus/khomus.nichost.ru/docs/bitrix/modules/main/lib/composite/internals/locker.php:26
#4: Bitrix\Main\Composite\Internals\Locker::lock(string)
	/home/khomus/khomus.nichost.ru/docs/bitrix/modules/main/lib/composite/engine.php:475
#5: Bitrix\Main\Composite\Engine::processPageContent(string)
	/home/khomus/khomus.nichost.ru/docs/bitrix/modules/main/lib/composite/engine.php:422
#6: Bitrix\Main\Composite\Engine::endBuffering(string, string)
	/home/khomus/khomus.nichost.ru/docs/bitrix/modules/main/classes/general/main.php:3195
#7: CAllMain->EndBufferContent(string)
	/home/khomus/khomus.nichost.ru/docs/bitrix/modules/main/classes/general/main.php:3139
#8: CAllMain->EndBufferContentMan()
	/home/khomus/khomus.nichost.ru/docs/bitrix/modules/main/include/epilog_after.php:36
#9: require(string)
	/home/khomus/khomus.nichost.ru/docs/bitrix/modules/main/include/epilog.php:3
#10: include(string)
	/home/khomus/khomus.nichost.ru/docs/bitrix/modules/main/classes/general/main.php:313
#11: CAllMain->AuthForm(string)
	/home/khomus/khomus.nichost.ru/docs/bitrix/components/bitrix/forum/templates/.default/auth.php:2
#12: include(string)
	/home/khomus/khomus.nichost.ru/docs/bitrix/modules/main/classes/general/component_template.php:725
#13: CBitrixComponentTemplate->__IncludePHPTemplate(array, array, string)
	/home/khomus/khomus.nichost.ru/docs/bitrix/modules/main/classes/general/component_template.php:820
#14: CBitrixComponentTemplate->IncludeTemplate(array)
	/home/khomus/khomus.nichost.ru/docs/bitrix/modules/main/classes/general/component.php:735
#15: CBitrixComponent->showComponentTemplate()
	/home/khomus/khomus.nichost.ru/docs/bitrix/modules/main/classes/general/component.php:683
#16: CBitrixComponent->includeComponentTemplate(string)
	/home/khomus/khomus.nichost.ru/docs/bitrix/components/bitrix/forum/component.php:130
#17: include(string)
	/home/khomus/khomus.nichost.ru/docs/bitrix/modules/main/classes/general/component.php:594
#18: CBitrixComponent->__includeComponent()
	/home/khomus/khomus.nichost.ru/docs/bitrix/modules/main/classes/general/component.php:653
#19: CBitrixComponent->includeComponent(string, array, boolean)
	/home/khomus/khomus.nichost.ru/docs/bitrix/modules/main/classes/general/main.php:1038
#20: CAllMain->IncludeComponent(string, string, array, boolean)
	/home/khomus/khomus.nichost.ru/docs/forum/index.php:101