[Bitrix\Main\DB\SqlQueryException] 
Mysql query error: (2006) MySQL server has gone away (400)
SELECT 
	`iblock_property`.`ID` AS `ID`,
	`iblock_property`.`CODE` AS `CODE`
FROM `b_iblock_property` `iblock_property` 

WHERE `iblock_property`.`IBLOCK_ID` = 20
AND `iblock_property`.`ACTIVE` = 'Y'
ORDER BY `iblock_property`.`SORT` ASC, `ID` ASC
/home/bitrix/www/bitrix/modules/main/lib/db/mysqliconnection.php:137
#0: Bitrix\Main\DB\MysqliConnection->queryInternal(string, array, NULL)
	/home/bitrix/www/bitrix/modules/main/lib/db/connection.php:330
#1: Bitrix\Main\DB\Connection->query(string)
	/home/bitrix/www/bitrix/modules/main/lib/entity/query.php:3038
#2: Bitrix\Main\Entity\Query->query(string)
	/home/bitrix/www/bitrix/modules/main/lib/entity/query.php:797
#3: Bitrix\Main\Entity\Query->exec()
	/home/bitrix/www/bitrix/modules/main/lib/entity/datamanager.php:290
#4: Bitrix\Main\Entity\DataManager::getList(array)
	/home/bitrix/www/bitrix/modules/iblock/lib/component/base.php:1990
#5: Bitrix\Iblock\Component\Base->getPropertyList(integer, array)
	/home/bitrix/www/bitrix/modules/iblock/lib/component/elementlist.php:750
#6: Bitrix\Iblock\Component\ElementList->modifyDisplayProperties(integer, array)
	/home/bitrix/www/bitrix/modules/iblock/lib/component/base.php:630
#7: Bitrix\Iblock\Component\Base->initElementList()
	/home/bitrix/www/bitrix/components/bitrix/catalog.section/class.php:575
#8: CatalogSectionComponent->initElementList()
	/home/bitrix/www/bitrix/modules/iblock/lib/component/base.php:3573
#9: Bitrix\Iblock\Component\Base->processResultData()
	/home/bitrix/www/bitrix/components/bitrix/catalog.section/class.php:90
#10: CatalogSectionComponent->processResultData()
	/home/bitrix/www/bitrix/modules/iblock/lib/component/base.php:4032
#11: Bitrix\Iblock\Component\Base->loadData()
	/home/bitrix/www/bitrix/modules/iblock/lib/component/elementlist.php:1096
#12: Bitrix\Iblock\Component\ElementList->loadData()
	/home/bitrix/www/bitrix/modules/iblock/lib/component/base.php:4021
#13: Bitrix\Iblock\Component\Base->initialLoadAction()
	/home/bitrix/www/bitrix/components/bitrix/catalog.section/class.php:327
#14: CatalogSectionComponent->initialLoadAction()
	
#15: call_user_func(array)
	/home/bitrix/www/bitrix/modules/iblock/lib/component/base.php:4206
#16: Bitrix\Iblock\Component\Base->doAction()
	/home/bitrix/www/bitrix/modules/iblock/lib/component/base.php:4224
#17: Bitrix\Iblock\Component\Base->executeComponent()
	/home/bitrix/www/bitrix/modules/main/classes/general/component.php:638
#18: CBitrixComponent->includeComponent(string, array, boolean)
	/home/bitrix/www/bitrix/modules/main/classes/general/main.php:1037
#19: CAllMain->IncludeComponent(string, string, array, boolean)
	/home/bitrix/www/local/templates/medtech/components/bitrix/news.detail/brand/component_epilog.php:115
#20: include(string)
	/home/bitrix/www/bitrix/modules/main/classes/general/component.php:1448
#21: CBitrixComponent->includeComponentEpilog(array)
	/home/bitrix/www/bitrix/modules/main/classes/general/component.php:1015
#22: CBitrixComponent->startResultCache(integer, array)
	/home/bitrix/www/bitrix/components/bitrix/news.detail/component.php:137
#23: include(string)
	/home/bitrix/www/bitrix/modules/main/classes/general/component.php:594
#24: CBitrixComponent->__includeComponent()
	/home/bitrix/www/bitrix/modules/main/classes/general/component.php:653
#25: CBitrixComponent->includeComponent(string, array, object)
	/home/bitrix/www/bitrix/modules/main/classes/general/main.php:1037
#26: CAllMain->IncludeComponent(string, string, array, object)
	/home/bitrix/www/local/templates/medtech/components/bitrix/news/brands/detail.php:55
#27: include(string)
	/home/bitrix/www/bitrix/modules/main/classes/general/component_template.php:720
#28: CBitrixComponentTemplate->__IncludePHPTemplate(array, array, string)
	/home/bitrix/www/bitrix/modules/main/classes/general/component_template.php:815
#29: CBitrixComponentTemplate->IncludeTemplate(array)
	/home/bitrix/www/bitrix/modules/main/classes/general/component.php:735
#30: CBitrixComponent->showComponentTemplate()
	/home/bitrix/www/bitrix/modules/main/classes/general/component.php:683
#31: CBitrixComponent->includeComponentTemplate(string)
	/home/bitrix/www/bitrix/components/bitrix/news/component.php:216
#32: include(string)
	/home/bitrix/www/bitrix/modules/main/classes/general/component.php:594
#33: CBitrixComponent->__includeComponent()
	/home/bitrix/www/bitrix/modules/main/classes/general/component.php:653
#34: CBitrixComponent->includeComponent(string, array, NULL)
	/home/bitrix/www/bitrix/modules/main/classes/general/main.php:1037
#35: CAllMain->IncludeComponent(string, string, array)
	/home/bitrix/www/brands/index.php:8
#36: include_once(string)
	/home/bitrix/www/bitrix/modules/main/include/urlrewrite.php:159
#37: include_once(string)
	/home/bitrix/www/bitrix/urlrewrite.php:2