Additional uncaught exception thrown while handling exception.

Original

Error: Call to undefined function module_list() in bootstrap_invoke_all() (line 1343 of /var/www/webmountech/data/www/multisite.prod/web/includes/bootstrap.inc).

Additional

RedisException: Connection refused in Redis->connect() (line 14 of /var/www/webmountech/data/www/multisite.prod/web/sites/all/modules/contrib/redis/lib/Redis/Client/PhpRedis.php).