[LearnException] 
EA_SQLERROR (4096)
/var/www/fastuser/data/www/autocenter-yar.ru/bitrix/modules/learning/classes/general/clearnlesson.php:1840
#0: CLearnLesson::GetListUni(array, array, array, integer, string, array)
	/var/www/fastuser/data/www/autocenter-yar.ru/bitrix/modules/learning/classes/general/clearnlesson.php:1856
#1: CLearnLesson::GetListOfImmediateChilds(string, array, array, array)
	/var/www/fastuser/data/www/autocenter-yar.ru/bitrix/modules/learning/classes/general/clearnlessontree.php:164
#2: CLearnLessonTree->BuildTreeRecursive(string, array, array, integer, string, array, array)
	/var/www/fastuser/data/www/autocenter-yar.ru/bitrix/modules/learning/classes/general/clearnlessontree.php:207
#3: CLearnLessonTree->BuildTreeRecursive(string, array, array, integer, string, array, array)
	/var/www/fastuser/data/www/autocenter-yar.ru/bitrix/modules/learning/classes/general/clearnlessontree.php:207
#4: CLearnLessonTree->BuildTreeRecursive(string, array, array, integer, string, array, array)
	/var/www/fastuser/data/www/autocenter-yar.ru/bitrix/modules/learning/classes/general/clearnlessontree.php:207
#5: CLearnLessonTree->BuildTreeRecursive(integer, array, array, integer, NULL, array, array)
	/var/www/fastuser/data/www/autocenter-yar.ru/bitrix/modules/learning/classes/general/clearnlessontree.php:61
#6: CLearnLessonTree->__construct(integer, array, array, boolean, array)
	/var/www/fastuser/data/www/autocenter-yar.ru/bitrix/modules/learning/classes/general/clearnlesson.php:1874
#7: CLearnLesson::GetTree(integer, array, array, boolean, array)
	/var/www/fastuser/data/www/autocenter-yar.ru/bitrix/modules/learning/classes/general/course.php:421
#8: CCourse::GetCourseContent(integer, array)
	/var/www/fastuser/data/www/autocenter-yar.ru/bitrix/components/bitrix/learning.chapter.detail/component.php:205
#9: include(string)
	/var/www/fastuser/data/www/autocenter-yar.ru/bitrix/modules/main/classes/general/component.php:605
#10: CBitrixComponent->__includeComponent()
	/var/www/fastuser/data/www/autocenter-yar.ru/bitrix/modules/main/classes/general/component.php:664
#11: CBitrixComponent->includeComponent(string, array, object)
	/var/www/fastuser/data/www/autocenter-yar.ru/bitrix/modules/main/classes/general/main.php:1039
#12: CAllMain->IncludeComponent(string, string, array, object)
	/var/www/fastuser/data/www/autocenter-yar.ru/bitrix/components/bitrix/learning.course/templates/.default/chapter.detail.php:32
#13: include(string)
	/var/www/fastuser/data/www/autocenter-yar.ru/bitrix/modules/main/classes/general/component_template.php:725
#14: CBitrixComponentTemplate->__IncludePHPTemplate(array, array, string)
	/var/www/fastuser/data/www/autocenter-yar.ru/bitrix/modules/main/classes/general/component_template.php:820
#15: CBitrixComponentTemplate->IncludeTemplate(array)
	/var/www/fastuser/data/www/autocenter-yar.ru/bitrix/modules/main/classes/general/component.php:746
#16: CBitrixComponent->showComponentTemplate()
	/var/www/fastuser/data/www/autocenter-yar.ru/bitrix/modules/main/classes/general/component.php:694
#17: CBitrixComponent->includeComponentTemplate(string)
	/var/www/fastuser/data/www/autocenter-yar.ru/bitrix/components/bitrix/learning.course/component.php:504
#18: include(string)
	/var/www/fastuser/data/www/autocenter-yar.ru/bitrix/modules/main/classes/general/component.php:605
#19: CBitrixComponent->__includeComponent()
	/var/www/fastuser/data/www/autocenter-yar.ru/bitrix/modules/main/classes/general/component.php:664
#20: CBitrixComponent->includeComponent(string, array, NULL)
	/var/www/fastuser/data/www/autocenter-yar.ru/bitrix/modules/main/classes/general/main.php:1039
#21: CAllMain->IncludeComponent(string, string, array)
	/var/www/fastuser/data/www/autocenter-yar.ru/help/index.php:12

Fatal error: Uncaught Bitrix\Main\DB\SqlQueryException: Mysql query error: (2006) MySQL server has gone away in /var/www/fastuser/data/www/autocenter-yar.ru/bitrix/modules/main/lib/db/mysqliconnection.php:137 Stack trace: #0 /var/www/fastuser/data/www/autocenter-yar.ru/bitrix/modules/main/lib/db/connection.php(330): Bitrix\Main\DB\MysqliConnection->queryInternal('SELECT \n\t`main_...', Array, NULL) #1 /var/www/fastuser/data/www/autocenter-yar.ru/bitrix/modules/main/lib/orm/query/query.php(3304): Bitrix\Main\DB\Connection->query('SELECT \n\t`main_...') #2 /var/www/fastuser/data/www/autocenter-yar.ru/bitrix/modules/main/lib/orm/query/query.php(816): Bitrix\Main\ORM\Query\Query->query('SELECT \n\t`main_...') #3 /var/www/fastuser/data/www/autocenter-yar.ru/bitrix/modules/main/lib/orm/data/datamanager.php(500): Bitrix\Main\ORM\Query\Query->exec() #4 /var/www/fastuser/data/www/autocenter-yar.ru/bitrix/modules/main/lib/analytics/sitespeed.php(95): Bitrix\Main\ORM\Data\DataManager::getList(Array) #5 /var/www/fastuser/data/www/aut in /var/www/fastuser/data/www/autocenter-yar.ru/bitrix/modules/main/lib/db/mysqliconnection.php on line 137