[Bitrix\Main\DB\SqlQueryException] 
Mysql query error: (2006) MySQL server has gone away (400)
SELECT 
	`security_session`.`SESSION_DATA` AS `SESSION_DATA`
FROM `b_sec_session` `security_session` 

WHERE `security_session`.`SESSION_ID` = 's6XVyqnjc7Kya4i65kaxZqqWUbVkgdZS'
LIMIT 0, 1

/var/www/vhosts/galactica-gsm.com/httpdocs/bitrix/modules/main/lib/db/mysqliconnection.php:137
#0: Bitrix\Main\DB\MysqliConnection->queryInternal(string, array, NULL)
	/var/www/vhosts/galactica-gsm.com/httpdocs/bitrix/modules/main/lib/db/connection.php:329
#1: Bitrix\Main\DB\Connection->query(string)
	/var/www/vhosts/galactica-gsm.com/httpdocs/bitrix/modules/main/lib/entity/query.php:1821
#2: Bitrix\Main\Entity\Query->query(string)
	/var/www/vhosts/galactica-gsm.com/httpdocs/bitrix/modules/main/lib/entity/query.php:454
#3: Bitrix\Main\Entity\Query->exec()
	/var/www/vhosts/galactica-gsm.com/httpdocs/bitrix/modules/main/lib/entity/datamanager.php:242
#4: Bitrix\Main\Entity\DataManager::getList(array)
	/var/www/vhosts/galactica-gsm.com/httpdocs/bitrix/modules/main/lib/entity/datamanager.php:171
#5: Bitrix\Main\Entity\DataManager::getRow(array)
	/var/www/vhosts/galactica-gsm.com/httpdocs/bitrix/modules/security/classes/general/session_db.php:59
#6: CSecuritySessionDB::read(string)
	
#7: session_start()
	/var/www/vhosts/galactica-gsm.com/httpdocs/bitrix/modules/main/include.php:286
#8: require_once(string)
	/var/www/vhosts/galactica-gsm.com/httpdocs/bitrix/modules/main/include/prolog_before.php:14
#9: require_once(string)
	/var/www/vhosts/galactica-gsm.com/httpdocs/bitrix/modules/main/include/prolog.php:10
#10: require_once(string)
	/var/www/vhosts/galactica-gsm.com/httpdocs/bitrix/header.php:1
#11: require(string)
	/var/www/vhosts/galactica-gsm.com/httpdocs/catalog/index.php:2
#12: include_once(string)
	/var/www/vhosts/galactica-gsm.com/httpdocs/bitrix/modules/main/include/urlrewrite.php:159
#13: include_once(string)
	/var/www/vhosts/galactica-gsm.com/httpdocs/bitrix/urlrewrite.php:2

Fatal error: Uncaught exception 'Bitrix\Main\DB\SqlQueryException' with message 'Mysql query error: (2006) MySQL server has gone away' in /var/www/vhosts/galactica-gsm.com/httpdocs/bitrix/modules/main/lib/db/mysqliconnection.php:137 Stack trace: #0 /var/www/vhosts/galactica-gsm.com/httpdocs/bitrix/modules/main/lib/db/connection.php(329): Bitrix\Main\DB\MysqliConnection->queryInternal('\n\t\t\t\tSELECT FRO...', Array, NULL) #1 /var/www/vhosts/galactica-gsm.com/httpdocs/bitrix/modules/main/lib/eventmanager.php(248): Bitrix\Main\DB\Connection->query('\n\t\t\t\tSELECT FRO...') #2 /var/www/vhosts/galactica-gsm.com/httpdocs/bitrix/modules/main/lib/eventmanager.php(340): Bitrix\Main\EventManager->loadEventHandlers() #3 /var/www/vhosts/galactica-gsm.com/httpdocs/bitrix/modules/main/lib/eventmanager.php(375): Bitrix\Main\EventManager->findEventHandlers('security', 'SessionOnBefore...', NULL) #4 /var/www/vhosts/galactica-gsm.com/httpdocs/bitrix/modules/main/lib/event.php(112): Bitrix\Main\EventManager->send(Object(Bitrix\Main\Entit in /var/www/vhosts/galactica-gsm.com/httpdocs/bitrix/modules/main/lib/db/mysqliconnection.php on line 137