[Bitrix\Main\DB\SqlQueryException] 
Mysql query error: (2006) MySQL server has gone away (400)
SELECT 
	`highloadblock_highload_block`.`ID` AS `ID`,
	`highloadblock_highload_block`.`NAME` AS `NAME`,
	`highloadblock_highload_block`.`TABLE_NAME` AS `TABLE_NAME`
FROM `b_hlblock_entity` `highloadblock_highload_block` 

WHERE `highloadblock_highload_block`.`ID` = 12
/var/www/html/bitrix/modules/main/lib/db/mysqliconnection.php:137
#0: Bitrix\Main\DB\MysqliConnection->queryInternal(string, array, NULL)
	/var/www/html/bitrix/modules/main/lib/db/connection.php:329
#1: Bitrix\Main\DB\Connection->query(string)
	/var/www/html/bitrix/modules/main/lib/entity/query.php:1924
#2: Bitrix\Main\Entity\Query->query(string)
	/var/www/html/bitrix/modules/main/lib/entity/query.php:505
#3: Bitrix\Main\Entity\Query->exec()
	/var/www/html/bitrix/modules/main/lib/entity/datamanager.php:255
#4: Bitrix\Main\Entity\DataManager::getList(array)
	/var/www/html/bitrix/modules/main/lib/entity/datamanager.php:133
#5: Bitrix\Main\Entity\DataManager::getByPrimary(string)
	/var/www/html/bitrix/modules/main/lib/entity/datamanager.php:144
#6: Bitrix\Main\Entity\DataManager::getById(string)
	/var/www/html/local/php_interface/HL_Helper.php:47
#7: HLClassByID(string)
	/var/www/html/local/php_interface/init.php:9318
#8: get301Redirect(string)
	/var/www/html/local/php_interface/init.php:7602
#9: include_once(string)
	/var/www/html/bitrix/modules/main/include.php:247
#10: require_once(string)
	/var/www/html/bitrix/modules/main/include/prolog_before.php:14
#11: require_once(string)
	/var/www/html/bitrix/click.php:3