Hi @yo_sono_io,
check the redis configuration, that the redis instance is up and you have the right permissions to access the redis socket.
Basically, openvas -s should show the db_address which is the path to the redis socket. This must be the same you have configured in your redis.conf, and the user running ospd-openvas must have permissions on the socket (add the user to the redis group). You have to set the socket permissions in the redis.conf as well (unixsocketperm 770), or just chmod the socket after starting redis.
Best regards,