Fatal error: Uncaught Error: Undefined constant Redis::SERIALIZER_IGBINARY in /home/bitrix/www/bitrix/.settings.php:57 Stack trace: #0 /home/bitrix/www/bitrix/modules/main/lib/config/configuration.php(96): include() #1 /home/bitrix/www/bitrix/modules/main/lib/config/configuration.php(221): Bitrix\Main\Config\Configuration->loadConfiguration() #2 /home/bitrix/www/bitrix/modules/main/lib/di/servicelocator.php(93): Bitrix\Main\Config\Configuration->offsetExists() #3 /home/bitrix/www/bitrix/modules/main/lib/application.php(85): Bitrix\Main\DI\ServiceLocator->registerByGlobalSettings() #4 /home/bitrix/www/bitrix/modules/main/lib/application.php(102): Bitrix\Main\Application->__construct() #5 /home/bitrix/www/bitrix/modules/main/start.php(32): Bitrix\Main\Application::getInstance() #6 /home/bitrix/www/bitrix/modules/main/include.php(14): require_once('...') #7 /home/bitrix/www/bitrix/modules/main/include/prolog_before.php(19): require_once('...') #8 /home/bitrix/www/bitrix/modules/main/include/prolog.php(10): require_once('...') #9 /home/bitrix/www/bitrix/header.php(1): require_once('...') #10 /home/bitrix/www/auth/index.php(3): require('...') #11 {main} thrown in /home/bitrix/www/bitrix/.settings.php on line 57