Connection Timed out: No further Information

I and my friend tried to join in my Realm but since yesterday but my realm refused us. The realm worked well before yesterday and we could join and play. I reset my router several times and I tried to log out and log in again my Minecraft account. It does not work. I am not even able to switch the world slot or reset the world to one of the backups. I just re-rented the realm and there are 27 days left.