[Bitrix\Main\DB\SqlQueryException] 
Mysql query error: (2006) MySQL server has gone away (400)
SELECT 
	`aspro_max_smartseo_models_smartseo_setting`.`CODE` AS `CODE`,
	`aspro_max_smartseo_models_smartseo_setting`.`VALUE` AS `VALUE`,
	`aspro_max_smartseo_models_smartseo_setting`.`ID` AS `UALIAS_0`
FROM `b_aspro_max_smartseo_setting` `aspro_max_smartseo_models_smartseo_setting` 

/var/www/html/bookcity.uk/html/bitrix/modules/main/lib/db/mysqliconnection.php:137
#0: Bitrix\Main\DB\MysqliConnection->queryInternal(string, array, NULL)
	/var/www/html/bookcity.uk/html/bitrix/modules/main/lib/db/connection.php:330
#1: Bitrix\Main\DB\Connection->query(string)
	/var/www/html/bookcity.uk/html/bitrix/modules/main/lib/orm/query/query.php:3398
#2: Bitrix\Main\ORM\Query\Query->query(string)
	/var/www/html/bookcity.uk/html/bitrix/modules/main/lib/orm/query/query.php:825
#3: Bitrix\Main\ORM\Query\Query->exec()
	/var/www/html/bookcity.uk/html/bitrix/modules/main/lib/orm/data/datamanager.php:500
#4: Bitrix\Main\ORM\Data\DataManager::getList(array)
	/var/www/html/bookcity.uk/html/bitrix/modules/aspro.max/lib/smartseo/models/smartseosetting.php:258
#5: Aspro\Max\Smartseo\Models\SmartseoSettingTable::getGeneralSettings()
	/var/www/html/bookcity.uk/html/bitrix/modules/aspro.max/classes/smartseo/admin/settings/SettingSmartseo.php:20
#6: Aspro\Max\Smartseo\Admin\Settings\SettingSmartseo->__construct()
	/var/www/html/bookcity.uk/html/bitrix/modules/aspro.max/classes/smartseo/admin/settings/SettingSmartseo.php:32
#7: Aspro\Max\Smartseo\Admin\Settings\SettingSmartseo::getInstance()
	/var/www/html/bookcity.uk/html/bitrix/modules/aspro.max/classes/smartseo/general/Smartseo.php:21
#8: Aspro\Max\Smartseo\General\Smartseo::init()
	/var/www/html/bookcity.uk/html/bitrix/modules/aspro.max/classes/smartseo/general/SmartseoEventHandler.php:12
#9: Aspro\Max\Smartseo\General\SmartseoEventHandler::onPageStart()
	/var/www/html/bookcity.uk/html/bitrix/modules/main/classes/general/module.php:480
#10: ExecuteModuleEventEx(array)
	/var/www/html/bookcity.uk/html/bitrix/modules/main/include.php:292
#11: require_once(string)
	/var/www/html/bookcity.uk/html/bitrix/modules/main/include/prolog_before.php:14
#12: require_once(string)
	/var/www/html/bookcity.uk/html/bitrix/modules/main/include/prolog.php:10
#13: require_once(string)
	/var/www/html/bookcity.uk/html/bitrix/header.php:1
#14: require(string)
	/var/www/html/bookcity.uk/html/catalog/index.php:1
#15: include_once(string)
	/var/www/html/bookcity.uk/html/bitrix/modules/main/include/urlrewrite.php:159
#16: include_once(string)
	/var/www/html/bookcity.uk/html/bitrix/urlrewrite.php:2