Can’t connect to realms, store or servers.

Since about last Wednesday, I haven’t been able to connect to the store or realms. I can disconnect from WiFi and get in on cell data, but I want to play on WiFi. I’m on AT&T with an NVG589 router. Nothing has changed in the settings and I’ve tried opening some ports, but nothing. In local games I get: “Oops! Your Microsoft account was disconnected.