Minecraft beta program with online multiplayer

make sure that one of you are not part of the Minecraft Beta Insider Program as this interferes with multiplayer

Who is joining which world? Are you joining her world on PC, or is she joining your world on Xbox?

Was there any change in both of your networking environment, or was additional software installed on her PC like an anti-virus program that came with a third party firewall?

Also are your worlds set to allow multiplayer in the world settings before you enter your world?

Do you get a specific error message that prevents you from joining the multiplayer world?

Did someone join the Minecraft Beta through the Insider Program and is now on a "newer" Minecraft version?

As the others already mentioned, did you make sure both your
online and privacy settings allow you to play online multiplayer and see other people's creations?

Hello, i was wondering if you are part of the Insider Program on The Xbox One ? If you are you might want to check and see if you joined the Minecraft beta. I only say this because i’m in the insider program and my Minecraft would never load either until
a friend of mine asked if i was in the insider program beta and i said yes. Then he told me to leave the Minecraft beta program within the insider program and since then i’ve had no issues at all with minecraft. To check you go to the insider program app on
your Xbox One and then to to insider content and then click on Minecraft then leave the Minecraft beta. I hope this helps you out because i spent forever trying to figure out this problem.

Are you in the Minecraft beta or insider program?

Looked through some of the help articles - man the information is confusing.

Anyways from what I'm inferring from the posts is that you can play Windows 10 to Windows 10, and Pocket Edition to Windows 10 and that's it right now.

https://support.xbox.com/en-CA/games/game-titles/minecraft-help-on-different-devices

"You can play Minecraft: Windows 10 Edition Beta with other devices running Pocket Edition, such as Windows 10 and Windows Phone devices. Right now, you can play local multiplayer on Minecraft: Windows 10 Edition Beta. Soon after the launch, online
play will be available for Minecraft: Windows 10 Edition Beta."

http://support.xbox.com/en-CA/games/game-titles/minecraft-windows-10-edition-beta-faq#a5eebb2f431442ff850f552a209f44ed

Can I play online with other people on Windows 10? Or on different devices?

You can play with up to four other people running Minecraft: Windows 10 Edition Beta or Pocket Edition on your local network. You can also play online with up to four of your Xbox Live friends in online multiplayer gaming.