[Bitrix\Main\DB\SqlQueryException] 
Mysql query error: (2006) MySQL server has gone away (400)
SELECT 
	`b24connector_button`.`ID` AS `ID`,
	`b24connector_button`.`APP_ID` AS `APP_ID`,
	`b24connector_button`.`ADD_DATE` AS `ADD_DATE`,
	`b24connector_button`.`ADD_BY` AS `ADD_BY`,
	`b24connector_button`.`NAME` AS `NAME`,
	`b24connector_button`.`SCRIPT` AS `SCRIPT`
FROM `b_b24connector_buttons` `b24connector_button` 

WHERE `b24connector_button`.`APP_ID` = 1
/home/bitrix/shared/bitrix/modules/main/lib/db/mysqliconnection.php:137
#0: Bitrix\Main\DB\MysqliConnection->queryInternal(string, array, NULL)
	/home/bitrix/shared/bitrix/modules/main/lib/db/connection.php:329
#1: Bitrix\Main\DB\Connection->query(string)
	/home/bitrix/shared/bitrix/modules/main/lib/entity/query.php:2839
#2: Bitrix\Main\Entity\Query->query(string)
	/home/bitrix/shared/bitrix/modules/main/lib/entity/query.php:777
#3: Bitrix\Main\Entity\Query->exec()
	/home/bitrix/shared/bitrix/modules/main/lib/entity/datamanager.php:260
#4: Bitrix\Main\Entity\DataManager::getList(array)
	/home/bitrix/shared/bitrix/modules/b24connector/lib/helper.php:126
#5: Bitrix\B24Connector\Helper::onBeforeProlog()
	/home/bitrix/shared/bitrix/modules/main/classes/general/module.php:490
#6: ExecuteModuleEventEx(array)
	/home/bitrix/shared/bitrix/modules/main/include.php:564
#7: require_once(string)
	/home/bitrix/shared/bitrix/modules/main/include/prolog_before.php:14
#8: require_once(string)
	/home/bitrix/shared/bitrix/modules/main/include/prolog.php:10
#9: require_once(string)
	/home/bitrix/shared/bitrix/header.php:1
#10: require(string)
	/home/bitrix/www/catalog/index.php:2