Warning: session_start(): Error communicating with Redis server in /var/www/html/app/init.php on line 7

Fatal error: Uncaught RedisException: NOAUTH Authentication required. in /var/www/html/app/init.php:7 Stack trace: #0 /var/www/html/app/init.php(7): session_start() #1 /var/www/html/index.php(2): require_once('/var/www/html/a...') #2 {main} thrown in /var/www/html/app/init.php on line 7