Cannot login when away from home wifi

[insolitude]

Hi all, I can't figure out the problem here. I've been connecting just fine for months and I haven't changed any settings on my Android TV app or my home PC TV app ... but I'm no longer able to connect when I'm away from home.

Here are my PC TV settings: https://content.screencast.com/users/myscreens21/folders/Jing/media/569d8e7d-8fe3-4268-93cf-dbee59e9caa6/2017-04-16_1244.png

The only thing I can think of is I think WiFi was turned off on my phone at some point, but it's back on. It's set to automatically connect to my home WiFi so whenever I'm home that's what happens. My phone connects to my home WiFi and I can connect via TV to my home PC. But when I'm away from home my phone switches to TMO data and then I can't connect to my home PC via TV.

Any ideas?