Socket.io-redis gives error when added as adapter to Socket.io instance

Question

Im experimenting abit with Socket.io and Socket.Io-redis. I have my Redis server up and running. The error i get when starting the Socket.Io server is: ReplyError: ERR unknown command 'pubsub' I dont know why i get this error at all.

The Redis version i'm using is 2.4.5

io.adapter(redisIO({host: 'localhost', port: 6379}));

io.of('/').adapter.clients((err, clients) => {
            if(err){
                console.log('error!!')
                throw err;
            }

Answer 1

I fixed it by installing latest version of Redis! :)