Same issue as a lot of people have been reporting. I can't play quick match games. One I click on that tab, I'm taken to a blank screen.
I tried to temporary fixes that were recommended in some threads, and they didn't work for me.
I'm unable contact battle.net support as it's currently "offline". Additionally I cannot submit a ticket, as this feature is also blocked.
I have browsed the forums and cannot find any official report confirming this (apparently widespread) issue.
Blizzard, this is shamefully poor service. It's bad enough that there is a serious problem like this, but ignoring it and not accepting phone calls is practically criminal. I paid good money for a service that I'm no longer receiving. Should I be asking for a refund?