[Bitrix\Main\DB\SqlQueryException] 
Mysql query error: (2006) MySQL server has gone away (400)

					SELECT
						P.ID
						,P.CODE
						,P.TEMPLATE
						,P.ENTITY_TYPE
						,P.ENTITY_ID
						,IP.VALUE
						,IP.ELEMENT_ID
					FROM
						b_iblock_element_iprop IP
						INNER JOIN b_iblock_iproperty P ON P.ID = IP.IPROP_ID
					WHERE
						IP.IBLOCK_ID = 21
						AND IP.ELEMENT_ID in (251218)
				
/home/bitrix/shared-student/bitrix/modules/main/lib/db/mysqliconnection.php:137
#0: Bitrix\Main\DB\MysqliConnection->queryInternal(string, array, NULL)
	/home/bitrix/shared-student/bitrix/modules/main/lib/db/connection.php:330
#1: Bitrix\Main\DB\Connection->query(string)
	/home/bitrix/shared-student/bitrix/modules/iblock/lib/inheritedproperty/elementvalues.php:149
#2: Bitrix\Iblock\InheritedProperty\ElementValues->queryValues()
	/home/bitrix/shared-student/bitrix/modules/iblock/lib/inheritedproperty/basevalues.php:104
#3: Bitrix\Iblock\InheritedProperty\BaseValues->getValues()
	/home/bitrix/shared-student/bitrix/modules/iblock/lib/component/base.php:1969
#4: Bitrix\Iblock\Component\Base->modifyElementCommonData(array)
	/home/bitrix/shared-student/bitrix/modules/iblock/lib/component/base.php:1941
#5: Bitrix\Iblock\Component\Base->processElement(array)
	/home/bitrix/shared-student/bitrix/components/bitrix/catalog.section/class.php:560
#6: CatalogSectionComponent->processElement(array)
	/home/bitrix/shared-student/bitrix/modules/iblock/lib/component/elementlist.php:792
#7: Bitrix\Iblock\Component\ElementList->getIblockElements(object)
	/home/bitrix/shared-student/bitrix/modules/iblock/lib/component/base.php:704
#8: Bitrix\Iblock\Component\Base->initElementList()
	/home/bitrix/shared-student/bitrix/components/bitrix/catalog.section/class.php:581
#9: CatalogSectionComponent->initElementList()
	/home/bitrix/shared-student/bitrix/modules/iblock/lib/component/base.php:3661
#10: Bitrix\Iblock\Component\Base->processResultData()
	/home/bitrix/shared-student/bitrix/components/bitrix/catalog.section/class.php:91
#11: CatalogSectionComponent->processResultData()
	/home/bitrix/shared-student/bitrix/modules/iblock/lib/component/base.php:4137
#12: Bitrix\Iblock\Component\Base->loadData()
	/home/bitrix/shared-student/bitrix/modules/iblock/lib/component/elementlist.php:1167
#13: Bitrix\Iblock\Component\ElementList->loadData()
	/home/bitrix/shared-student/bitrix/modules/iblock/lib/component/base.php:4126
#14: Bitrix\Iblock\Component\Base->initialLoadAction()
	/home/bitrix/shared-student/bitrix/components/bitrix/catalog.section/class.php:333
#15: CatalogSectionComponent->initialLoadAction()
	
#16: call_user_func(array)
	/home/bitrix/shared-student/bitrix/modules/iblock/lib/component/base.php:4311
#17: Bitrix\Iblock\Component\Base->doAction()
	/home/bitrix/shared-student/bitrix/modules/iblock/lib/component/base.php:4329
#18: Bitrix\Iblock\Component\Base->executeComponent()
	/home/bitrix/shared-student/bitrix/modules/main/classes/general/component.php:638
#19: CBitrixComponent->includeComponent(string, array, object)
	/home/bitrix/shared-student/bitrix/modules/main/classes/general/main.php:1038
#20: CAllMain->IncludeComponent(string, string, array, object)
	/home/bitrix/shared-student/bitrix/templates/proopt_default_s1/components/bitrix/catalog/gopro/section.php:380
#21: include(string)
	/home/bitrix/shared-student/bitrix/modules/main/classes/general/component_template.php:725
#22: CBitrixComponentTemplate->__IncludePHPTemplate(array, array, string)
	/home/bitrix/shared-student/bitrix/modules/main/classes/general/component_template.php:820
#23: CBitrixComponentTemplate->IncludeTemplate(array)
	/home/bitrix/shared-student/bitrix/modules/main/classes/general/component.php:735
#24: CBitrixComponent->showComponentTemplate()
	/home/bitrix/shared-student/bitrix/modules/main/classes/general/component.php:683
#25: CBitrixComponent->includeComponentTemplate(string)
	/home/bitrix/shared-student/bitrix/components/bitrix/catalog/component.php:171
#26: include(string)
	/home/bitrix/shared-student/bitrix/modules/main/classes/general/component.php:594
#27: CBitrixComponent->__includeComponent()
	/home/bitrix/shared-student/bitrix/modules/main/classes/general/component.php:653
#28: CBitrixComponent->includeComponent(string, array, boolean)
	/home/bitrix/shared-student/bitrix/modules/main/classes/general/main.php:1038
#29: CAllMain->IncludeComponent(string, string, array, boolean)
	/home/bitrix/ext_www/XN--H1AAKGNRYD5B.XN--P1AI/catalog/index.php:902
#30: include_once(string)
	/home/bitrix/shared-student/bitrix/modules/main/include/urlrewrite.php:159
#31: include_once(string)
	/home/bitrix/shared-student/bitrix/urlrewrite.php:2