Minecraft Realms asks me to create a realm when I try to join my friends. Play is grayed out.

Put the summary of the bug you're having here

What I expected to happen was...:
I select my friends world and click play.

What actually happened was...:
I select my friends world and a pop-up appears asking me to buy a realm.

Steps to Reproduce:
1. Cancel your own realm so friend's realm appears at the top,
2. Click on friend's realm.
3. Pop-up appears