[Bitrix\Main\DB\SqlQueryException] 
Mysql query error: (2006) MySQL server has gone away (400)
SELECT VALUE FROM b_iblock_41_index_val WHERE ID = 1
LIMIT 0, 1

/home/bitrix/www/bitrix/modules/main/lib/db/mysqliconnection.php:137
#0: Bitrix\Main\DB\MysqliConnection->queryInternal(string, NULL, NULL)
	/home/bitrix/www/bitrix/modules/main/lib/db/connection.php:330
#1: Bitrix\Main\DB\Connection->query(string, NULL, integer, integer)
	/home/bitrix/www/bitrix/modules/main/lib/db/connection.php:358
#2: Bitrix\Main\DB\Connection->queryScalar(string)
	/home/bitrix/www/bitrix/modules/iblock/lib/propertyindex/dictionary.php:167
#3: Bitrix\Iblock\PropertyIndex\Dictionary->getStringById(integer)
	/home/bitrix/www/bitrix/modules/iblock/lib/propertyindex/facet.php:129
#4: Bitrix\Iblock\PropertyIndex\Facet->lookupDictionaryValue(string)
	/home/bitrix/ext_www/s2/local/components/bitrix/catalog.smart.filter/class.php:414
#5: CBitrixCatalogSmartFilter->fillItemPrices(array, array)
	/home/bitrix/ext_www/s2/local/components/bitrix/catalog.smart.filter/component.php:112
#6: include(string)
	/home/bitrix/www/bitrix/modules/main/classes/general/component.php:605
#7: CBitrixComponent->__includeComponent()
	/home/bitrix/www/bitrix/modules/main/classes/general/component.php:103
#8: CBitrixComponent->executeComponent()
	/home/bitrix/ext_www/s2/local/components/bitrix/catalog.smart.filter/class.php:138
#9: CBitrixCatalogSmartFilter->executeComponent()
	/home/bitrix/www/bitrix/modules/main/classes/general/component.php:656
#10: CBitrixComponent->includeComponent(string, array, object, boolean)
	/home/bitrix/www/bitrix/modules/main/classes/general/main.php:1039
#11: CAllMain->IncludeComponent(string, string, array, object, array)
	/home/bitrix/www/bitrix/templates/magnet_s2/components/bitrix/catalog/main/section.php:288
#12: include(string)
	/home/bitrix/www/bitrix/modules/main/classes/general/component_template.php:789
#13: CBitrixComponentTemplate->__IncludePHPTemplate(array, array, string)
	/home/bitrix/www/bitrix/modules/main/classes/general/component_template.php:884
#14: CBitrixComponentTemplate->IncludeTemplate(array)
	/home/bitrix/www/bitrix/modules/main/classes/general/component.php:764
#15: CBitrixComponent->showComponentTemplate()
	/home/bitrix/www/bitrix/modules/main/classes/general/component.php:712
#16: CBitrixComponent->includeComponentTemplate(string)
	/home/bitrix/www/bitrix/components/bitrix/catalog/component.php:171
#17: include(string)
	/home/bitrix/www/bitrix/modules/main/classes/general/component.php:605
#18: CBitrixComponent->__includeComponent()
	/home/bitrix/www/bitrix/modules/main/classes/general/component.php:680
#19: CBitrixComponent->includeComponent(string, array, boolean, boolean)
	/home/bitrix/www/bitrix/modules/main/classes/general/main.php:1039
#20: CAllMain->IncludeComponent(string, string, array, boolean)
	/home/bitrix/ext_www/s2/index.php:782
#21: include_once(string)
	/home/bitrix/www/bitrix/modules/main/include/urlrewrite.php:159
#22: include_once(string)
	/home/bitrix/www/bitrix/urlrewrite.php:2