A proplem with connection

[InterAction_studios]

Your router is probably blocking communication between LAN and Wireless devices (or between Wireless and other Wireless devices)

I need help 2

Are you using Wi-Fi or a wired connection? It’s possible that you are connected to a router which has “wireless isolation” turned on. This means that all devices connected to the router can access the internet, but they can’t access each other. Example: WIRELESS, AP OR CLIENT ISOLATION I can’t think of another solution except logging into your router and turning this setting off.

If you or your sister can use a VPN to connect to the internet, then that would count as an internet game (and not a LAN game), so your router would allow the communication.