Networking Help - eviltoast

I just installed a mesh WiFi network in addition to my ISP-provided router that could barely reach upstairs. I had some locally hosted services set up as per Mediabox. All containers were set up with my machine IP(?) 192.xxx.x.xx and were working great inside my network, which is all I wanted to do while I’m learning. I noticed today that if I connect via the other, mesh WiFi network that this IP can’t be accessed, despite it being the same machine. What’s going on?

All advice much appreciated as I am (obviously) a self hosting novice!