Hi, I need help!

I can't play ranked or casual mode at all.
It started when I tried to play on my cellphone and I thought at first it was just a bug on the phone. But it wouldn't work on the tablet either and now, just tried on my PC and it still doesn't work!
Every other mode works fine, solo, tavern brawl, duels, battlegrounds and arena, I just checked and they all work. But when I click on "Play" to play ranked, the "wooden circlet" around the hearthstone logo spins forever and nothing happens. Tried googling to see if someone else had raised the issue but I found nothing.

Thanks