I can't join realms

I have 3 realms to play, but I can't join any of them.

What I expected to happen was...:
It should let me into the realm.

What actually happened was...:
It would stay on "Connecting to the realm" for however long I let it try to get in

Steps to Reproduce:
1. I don't know how it happened, I just tried to join a realm and it didn't work