Https://learn.pimoroni.com/tutorial/sandyj/streaming-spotify-to-your-pi

https://learn.pimoroni.com/tutorial/sandyj/streaming-spotify-to-your-pi

Just built this and all seemed to go well with the installation, but my browser gets no response when connecting to the iris webpage. I can ssh into the pi no problem: is there some diagnostic I can run to troubleshoot?