I don't own the realm, but when me and my friends try to join it, it says "unable to connect to the internet, please try again." It won't let us join the realm. Since all of us have the problem I believe that it is a problem with Minecraft itself not our devices. We were able to play on the realm for a couple of months, then this problem arose. It happened once, then it fixed itself, but now that it happened again it hasn't fixed itself.