Devices connected to XB7 Router are unable to network together

I have 5x devices (windows computer, 2x android phones, 1x Pi Server, and 2x printer) connected to my XB7 router. All can pull internet. And all are connected to the 5Ghz channel, aside from the Pi Server which is connected via ethernet to the XB7. They all have 10.0.0.x/24 addresses, but are unable to ping/see each other on the LAN. Any idea how I can fix this? If I'm unable to accomplish this, I'll have to switch routers and potentially services.

Thanks, Ryan