I get an error message when I try to enter a realm.

I logged into the game and tried to enter my realm. I got an error message stating "Invalid session. Please try restarting Minecraft".

What actually happened was...:
I followed the instructions on the error message and continued to get that message each time I tried to enter the realm after rebooting the game. I uninstalled and reinstalled it and still I get the error message.

Steps to Reproduce:
1. Log into the game
2. Click on "Minecraft Realms"
3. Receive error message.