[Bitrix\Main\DB\SqlQueryException] 
Mysql query error: Table '.\bitrix_19\b_sec_session' is marked as crashed and should be repaired (400)
SELECT 
	`security_session`.`SESSION_DATA` AS `SESSION_DATA`
FROM `b_sec_session` `security_session` 

WHERE `security_session`.`SESSION_ID` = 'W6lckNPMB1bsv0tk9MuVzbc5vTvOC8cj'
LIMIT 0, 1

C:\inetpub\wwwroot\nknh\bitrix\modules\main\lib\db\mysqlconnection.php:116
#0: Bitrix\Main\DB\MysqlConnection->queryInternal(string, array, NULL)
	C:\inetpub\wwwroot\nknh\bitrix\modules\main\lib\db\connection.php:329
#1: Bitrix\Main\DB\Connection->query(string)
	C:\inetpub\wwwroot\nknh\bitrix\modules\main\lib\entity\query.php:2839
#2: Bitrix\Main\Entity\Query->query(string)
	C:\inetpub\wwwroot\nknh\bitrix\modules\main\lib\entity\query.php:777
#3: Bitrix\Main\Entity\Query->exec()
	C:\inetpub\wwwroot\nknh\bitrix\modules\main\lib\entity\datamanager.php:260
#4: Bitrix\Main\Entity\DataManager::getList(array)
	C:\inetpub\wwwroot\nknh\bitrix\modules\main\lib\entity\datamanager.php:172
#5: Bitrix\Main\Entity\DataManager::getRow(array)
	C:\inetpub\wwwroot\nknh\bitrix\modules\security\classes\general\session_db.php:59
#6: CSecuritySessionDB::read(string)
	
#7: session_start()
	C:\inetpub\wwwroot\nknh\bitrix\modules\main\include.php:277
#8: require_once(string)
	C:\inetpub\wwwroot\nknh\bitrix\modules\main\include\prolog_before.php:14
#9: require_once(string)
	C:\inetpub\wwwroot\nknh\bitrix\modules\main\include\prolog.php:10
#10: require_once(string)
	C:\inetpub\wwwroot\nknh\bitrix\header.php:1
#11: require(string)
	C:\inetpub\wwwroot\nknh\products\index.php:2
#12: include_once(string)
	C:\inetpub\wwwroot\nknh\bitrix\modules\main\include\urlrewrite.php:159
#13: include_once(string)
	C:\inetpub\wwwroot\nknh\404.php:2

Fatal error: Uncaught exception 'Bitrix\Main\DB\SqlQueryException' with message 'Mysql query error: Table '.\bitrix_19\b_sec_session' is marked as crashed and should be repaired' in C:\inetpub\wwwroot\nknh\bitrix\modules\main\lib\db\mysqlconnection.php:116 Stack trace: #0 C:\inetpub\wwwroot\nknh\bitrix\modules\main\lib\db\mysqlcommonconnection.php(132): Bitrix\Main\DB\MysqlConnection->queryInternal('SELECT * FROM `...') #1 C:\inetpub\wwwroot\nknh\bitrix\modules\main\lib\db\connection.php(715): Bitrix\Main\DB\MysqlCommonConnection->getTableFields('b_sec_session') #2 C:\inetpub\wwwroot\nknh\bitrix\modules\main\lib\db\sqlhelper.php(387): Bitrix\Main\DB\Connection->getTableField('b_sec_session', 'SESSION_ID') #3 C:\inetpub\wwwroot\nknh\bitrix\modules\main\lib\entity\datamanager.php(918): Bitrix\Main\DB\SqlHelper->prepareAssignment('b_sec_session', 'SESSION_ID', 'W6lckNPMB1bsv0t...') #4 C:\inetpub\wwwroot\nknh\bitrix\modules\security\classes\general\session_db.php(92): Bitrix\Main\Entity\DataManager::delete('W6lckNPMB1bsv0t... in C:\inetpub\wwwroot\nknh\bitrix\modules\main\lib\db\mysqlconnection.php on line 116