[Error] 
Call to undefined function mysql_connect() (0)
/var/www/knigamir/data/www/knigamir.com/bitrix/modules/main/classes/mysql/database_mysql.php:19
#0: CDatabase->ConnectInternal()
	/var/www/knigamir/data/www/knigamir.com/bitrix/modules/main/classes/general/database.php:215
#1: CAllDatabase->DoConnect()
	/var/www/knigamir/data/www/knigamir.com/bitrix/modules/main/classes/mysql/database_mysql.php:74
#2: CDatabase->ForSql(string)
	/var/www/knigamir/data/www/knigamir.com/bitrix/modules/main/classes/general/usertype.php:3911
#3: CAllSQLWhere->addStringFilter(array, boolean, string, string, string)
	/var/www/knigamir/data/www/knigamir.com/bitrix/modules/main/classes/general/usertype.php:3595
#4: CAllSQLWhere->GetQueryEx(array, array)
	/var/www/knigamir/data/www/knigamir.com/bitrix/modules/main/classes/general/usertype.php:3480
#5: CAllSQLWhere->GetQuery(array)
	/var/www/knigamir/data/www/knigamir.com/bitrix/modules/main/lib/orm/query/query.php:1988
#6: Bitrix\Main\ORM\Query\Query->buildWhere()
	/var/www/knigamir/data/www/knigamir.com/bitrix/modules/main/lib/orm/query/query.php:2213
#7: Bitrix\Main\ORM\Query\Query->buildQuery()
	/var/www/knigamir/data/www/knigamir.com/bitrix/modules/main/lib/orm/query/query.php:787
#8: Bitrix\Main\ORM\Query\Query->exec()
	/var/www/knigamir/data/www/knigamir.com/bitrix/modules/main/lib/orm/data/datamanager.php:467
#9: Bitrix\Main\ORM\Data\DataManager::getList(array)
	/var/www/knigamir/data/www/knigamir.com/bitrix/modules/alexkova.sale24/lib/core.php:182
#10: Alexkova\Sale24\Core->getRule()
	/var/www/knigamir/data/www/knigamir.com/bitrix/modules/alexkova.sale24/lib/core.php:147
#11: Alexkova\Sale24\Core->isSale24()
	/var/www/knigamir/data/www/knigamir.com/bitrix/modules/alexkova.sale24/lib/prolog.php:16
#12: Alexkova\Sale24\Prolog::init()
	/var/www/knigamir/data/www/knigamir.com/bitrix/modules/main/classes/general/module.php:490
#13: ExecuteModuleEventEx(array)
	/var/www/knigamir/data/www/knigamir.com/bitrix/modules/main/include.php:284
#14: require_once(string)
	/var/www/knigamir/data/www/knigamir.com/bitrix/modules/main/include/prolog_before.php:14
#15: require_once(string)
	/var/www/knigamir/data/www/knigamir.com/bitrix/modules/main/include/prolog.php:10
#16: require_once(string)
	/var/www/knigamir/data/www/knigamir.com/bitrix/header.php:1
#17: require(string)
	/var/www/knigamir/data/www/knigamir.com/catalog/index.php:2
#18: include_once(string)
	/var/www/knigamir/data/www/knigamir.com/bitrix/modules/main/include/urlrewrite.php:159
#19: include_once(string)
	/var/www/knigamir/data/www/knigamir.com/bitrix/urlrewrite.php:2