Warning: Uncaught Exception: Warning: require(/var/www/html/pub/errors/503.php): failed to open stream: No such file or directory in /var/www/html/vendor/magento/framework/Session/SaveHandler/Redis.php on line 48 in /var/www/html/vendor/magento/framework/App/ErrorHandler.php:61 Stack trace: #0 /var/www/html/vendor/magento/framework/Session/SaveHandler/Redis.php(48): Magento\Framework\App\ErrorHandler->handler(2, 'require(/var/ww...', '/var/www/html/v...', 48, Array) #1 /var/www/html/vendor/magento/framework/Session/SaveHandler/Redis.php(48): require() #2 /var/www/html/vendor/magento/framework/Session/SaveHandler.php(93): Magento\Framework\Session\SaveHandler\Redis->read('vu31d6a5g2oeofu...') #3 [internal function]: Magento\Framework\Session\SaveHandler->read('vu31d6a5g2oeofu...') #4 /var/www/html/vendor/magento/framework/Session/SessionManager.php(189): session_start() #5 /var/www/html/vendor/magento/framework/Interception/Interceptor.php(60): Magento\Framework\Session\SessionManager->start() #6 /var/www/html/vendor/m in /var/www/html/vendor/magento/framework/App/ErrorHandler.php on line 61

Fatal error: Magento\Framework\Session\SaveHandler\Redis::read(): Failed opening required '/var/www/html/pub/errors/503.php' (include_path='/var/www/html/generated/code:/var/www/html/generated/code:/var/www/html/vendor/magento/zendframework1/library:.:/usr/share/php') in /var/www/html/vendor/magento/framework/Session/SaveHandler/Redis.php on line 48