[Bitrix\Main\DB\SqlQueryException] 
Mysql query error: (2006) MySQL server has gone away (400)
SELECT 
	`conversion_internals_context_counter_day`.`NAME` AS `NAME`,
	SUM(`conversion_internals_context_counter_day`.`VALUE`) AS `VALUE_SUM`
FROM `b_conv_context_counter_day` `conversion_internals_context_counter_day` 
INNER JOIN `b_conv_context_attribute` `conversion_internals_context_counter_day__conversion_attribute_1_` ON `conversion_internals_context_counter_day`.`CONTEXT_ID` = `conversion_internals_context_counter_day__conversion_attribute_1_`.`CONTEXT_ID`
WHERE `conversion_internals_context_counter_day`.`DAY` >= '2020-12-01'
AND `conversion_internals_context_counter_day`.`DAY` <= '2021-01-21'
AND `conversion_internals_context_counter_day`.`NAME` in ('conversion_visit_day', 'sale_payment_add_day', 'sale_payment_add', 'sale_payment_add_cmpfb', 'sale_payment_sum_add')
AND `conversion_internals_context_counter_day__conversion_attribute_1_`.`NAME` = 'conversion_site'
AND `conversion_internals_context_counter_day__conversion_attribute_1_`.`VALUE` = 'dc'
GROUP BY `conversion_internals_context_counter_day`.`NAME`
/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/orm/query/query.php:3398
#2: Bitrix\Main\ORM\Query\Query->query(string)
	/home/bitrix/www/bitrix/modules/main/lib/orm/query/query.php:825
#3: Bitrix\Main\ORM\Query\Query->exec()
	/home/bitrix/www/bitrix/modules/conversion/lib/reportcontext.php:53
#4: Bitrix\Conversion\ReportContext->getCountersDeprecated(array, NULL)
	/home/bitrix/www/bitrix/modules/conversion/lib/reportcontext.php:94
#5: Bitrix\Conversion\ReportContext->getRatesDeprecated(array, array, NULL)
	/home/bitrix/www/bitrix/modules/abtest/lib/adminhelper.php:135
#6: Bitrix\ABTest\AdminHelper::getSiteCapacity(string)
	/home/bitrix/www/bitrix/modules/abtest/lib/helper.php:53
#7: Bitrix\ABTest\Helper::getActiveTest()
	/home/bitrix/www/bitrix/modules/abtest/lib/helper.php:126
#8: Bitrix\ABTest\Helper::getContext()
	/home/bitrix/www/bitrix/modules/abtest/lib/eventhandler.php:37
#9: Bitrix\ABTest\EventHandler::onGetCurrentSiteTemplate(object)
	
#10: call_user_func_array(array, array)
	/home/bitrix/www/bitrix/modules/main/lib/eventmanager.php:435
#11: Bitrix\Main\EventManager->sendToEventHandler(array, object)
	/home/bitrix/www/bitrix/modules/main/lib/eventmanager.php:371
#12: Bitrix\Main\EventManager->send(object)
	/home/bitrix/www/bitrix/modules/main/lib/event.php:142
#13: Bitrix\Main\Event->send()
	/home/bitrix/www/bitrix/modules/main/classes/general/main.php:4529
#14: CAllSite::GetCurTemplate()
	/home/bitrix/www/bitrix/modules/main/include.php:535
#15: require_once(string)
	/home/bitrix/www/bitrix/modules/main/include/prolog_before.php:14
#16: require_once(string)
	/home/bitrix/www/bitrix/modules/main/include/prolog.php:10
#17: require_once(string)
	/home/bitrix/www/bitrix/header.php:3
#18: require(string)
	/home/bitrix/www/catalog/index.php:32
#19: include_once(string)
	/home/bitrix/www/bitrix/modules/main/include/urlrewrite.php:159
#20: include_once(string)
	/home/bitrix/www/bitrix/urlrewrite.php:2