Looking at the Installation Guide, there are a lot of little things that could be missed. When I installed mine, there was a video on Meridian's website that I found useful. In any case here are some things to check. Is your network cable connected to ethernet port 1 on the QNAP? Did you change the Web Server to port 81 on the QNAP? Did you go into the Meridian Sooloos Configuration app on your PC and enable System Core and Storage? Those are just a few things to check, but I would go through the Installation Guide again and check your setup. I'm running Ver. 4.3.4.0644 on my QNAP.

Charlie

QNAP, MS600, MS200, Anthem AVM 50v, B&W 804S, JL Fathom 113 (2)