This does not make sense. Lots of people here and other forums in other languages have the same problem so this is an origin screw-up of some kind. Everything was fine yesterday and today everybody´s firewall is blocking???? Total nonsense. STEAM is perfect. Also the origin online store is down so.....?
If u wanna play offline, go on offline mode and launch the game with the direct access ( provided u have it installed of course=).