Warning: Uncaught Magento\Framework\Exception\SessionException: Unable to connect to Redis in /var/www/clients/client1/web2/web/vendor/magento/framework/Session/SaveHandler/Redis.php:65 Stack trace: #0 /var/www/clients/client1/web2/web/vendor/magento/framework/Session/SaveHandler/Redis.php(81): Magento\Framework\Session\SaveHandler\Redis->getConnection() #1 /var/www/clients/client1/web2/web/vendor/magento/framework/Session/SaveHandler.php(59): Magento\Framework\Session\SaveHandler\Redis->open('/var/www/client...', 'PHPSESSID') #2 [internal function]: Magento\Framework\Session\SaveHandler->open('/var/www/client...', 'PHPSESSID') #3 /var/www/clients/client1/web2/web/vendor/magento/framework/Session/SessionManager.php(206): session_start() #4 /var/www/clients/client1/web2/web/vendor/magento/framework/Interception/Interceptor.php(58): Magento\Framework\Session\SessionManager->start() #5 /var/www/clients/client1/web2/web/vendor/magento/framework/Interception/Interceptor.php(138): Magento\Framework\Session\Generic\Intercept in /var/www/clients/client1/web2/web/vendor/magento/framework/Session/SaveHandler/Redis.php on line 65

Fatal error: session_start(): Failed to initialize storage module: user (path: /var/www/clients/client1/web2/tmp) in /var/www/clients/client1/web2/web/vendor/magento/framework/Session/SessionManager.php on line 206