Last night about 7pm, I was on the phone with ESPN talking to one of their backroom staff about this Toronto/Caps blackout problem: About 5 minutes later she became aware of other staff members in the office responding to many sudden phone calls on this same blackout problem. Moments later, she said we now see what happened, and it will be fixed shortly...with our apologies. So, it was human error.
A few minutes later, the blackout was lifted, and I was able to watch about 80% of a great game and a great overtime!