[Bitrix\Main\DB\ConnectionException] 
Mysql connect error [localhost]: (2006) MySQL server has gone away (400)
/home/bitrix/www/bitrix/modules/main/lib/db/mysqliconnection.php:65
#0: Bitrix\Main\DB\MysqliConnection->connectInternal()
	/home/bitrix/www/bitrix/modules/main/lib/db/mysqliconnection.php:122
#1: Bitrix\Main\DB\MysqliConnection->queryInternal(string, array, NULL)
	/home/bitrix/www/bitrix/modules/main/lib/db/connection.php:329
#2: Bitrix\Main\DB\Connection->query(string)
	/home/bitrix/www/bitrix/modules/security/classes/mysql/database.php:118
#3: CSecurityDB::Query(string, string)
	/home/bitrix/www/bitrix/modules/security/classes/mysql/database.php:53
#4: CSecurityDB::Init(boolean)
	/home/bitrix/www/bitrix/modules/security/classes/mysql/database.php:110
#5: CSecurityDB::Query(string, string)
	/home/bitrix/www/bitrix/modules/security/classes/general/antivirus.php:441
#6: CSecurityAntiVirus->dolog()
	/home/bitrix/www/bitrix/modules/security/classes/general/antivirus.php:600
#7: CSecurityAntiVirus->Analyze(string)
	/home/bitrix/www/bitrix/modules/security/classes/general/antivirus.php:197
#8: CSecurityAntiVirus::OnEndBufferContent(string)
	
#9: call_user_func_array(array, array)
	/home/bitrix/www/bitrix/modules/main/classes/general/module.php:490
#10: ExecuteModuleEventEx(array, array)
	/home/bitrix/www/bitrix/modules/main/classes/general/main.php:3254
#11: CAllMain->EndBufferContent(string)
	/home/bitrix/www/bitrix/modules/main/classes/general/main.php:3201
#12: CAllMain->EndBufferContentMan()
	/home/bitrix/www/bitrix/modules/main/include/epilog_after.php:36
#13: require(string)
	/home/bitrix/www/bitrix/modules/main/include/epilog.php:3
#14: require_once(string)
	/home/bitrix/www/bitrix/footer.php:4
#15: require(string)
	/home/bitrix/www/tyres/index.php:129
#16: include_once(string)
	/home/bitrix/www/bitrix/modules/main/include/urlrewrite.php:159
#17: include_once(string)
	/home/bitrix/www/bitrix/urlrewrite.php:2