[Bitrix\Main\DB\SqlQueryException] 
Mysql query error: MySQL server has gone away (400)
SELECT 
	`pages_hash`.`ID` AS `ID`,
	`pages_hash`.`UF_HASH_PAGE` AS `UF_HASH_PAGE`,
	`pages_hash`.`UF_HASH_URL` AS `UF_HASH_URL`,
	`pages_hash`.`UF_DATE_MODIFY` AS `UF_DATE_MODIFY`
FROM `pages_hash` `pages_hash` 

WHERE UPPER(`pages_hash`.`UF_HASH_URL`) like upper('s1-02cf9c0b551a4e8b26ac7b0252768168')
/home/bitrix/www/bitrix/modules/main/lib/db/mysqlconnection.php:116
#0: Bitrix\Main\DB\MysqlConnection->queryInternal(string, array, NULL)
	/home/bitrix/www/bitrix/modules/main/lib/db/connection.php:329
#1: Bitrix\Main\DB\Connection->query(string)
	/home/bitrix/www/bitrix/modules/main/lib/entity/query.php:1769
#2: Bitrix\Main\Entity\Query->query(string)
	/home/bitrix/www/bitrix/modules/main/lib/entity/query.php:454
#3: Bitrix\Main\Entity\Query->exec()
	/home/bitrix/www/bitrix/modules/main/lib/entity/datamanager.php:242
#4: Bitrix\Main\Entity\DataManager::getList(array)
	/home/bitrix/www/bitrix/modules/abudagov.lastmodified/include.php:72
#5: CAbudagovLastModified->ifModifiedSince(object)
	/home/bitrix/www/bitrix/modules/abudagov.lastmodified/include.php:247
#6: CAbudagovLastModified::setLastModified(string)
	
#7: call_user_func_array(array, array)
	/home/bitrix/www/bitrix/modules/main/classes/general/module.php:490
#8: ExecuteModuleEventEx(array, array)
	/home/bitrix/www/bitrix/modules/main/classes/general/main.php:3257
#9: CAllMain->EndBufferContent(string)
	/home/bitrix/www/bitrix/modules/main/classes/general/main.php:3197
#10: CAllMain->EndBufferContentMan()
	/home/bitrix/www/bitrix/modules/main/include/epilog_after.php:36
#11: require(string)
	/home/bitrix/www/bitrix/modules/main/include/epilog.php:3
#12: require_once(string)
	/home/bitrix/www/bitrix/footer.php:4
#13: require(string)
	/home/bitrix/www/obshchenie-i-obuchenie/blog/index.php:96
#14: include_once(string)
	/home/bitrix/www/bitrix/modules/main/include/urlrewrite.php:159
#15: include_once(string)
	/home/bitrix/www/bitrix/urlrewrite.php:2