Were you using a mobile device?  If so, you were probably experiencing a known problem discussed in another thread.  Even if you weren't using a mobile device, it's likely you were experiencing the same problem.

After many years of happily accessing TTF from the works PC (in my tea breaks, of course!), I now get that same message. Access from the home laptop is still fine. As Todd says, this problem is probably part of the larger one described above and certainly happened at around the same time..

There's a number of proxy sites that can be used to bridge the gap for a lot of things.  Like watching Dr. Who on bbc.co.uk, when you live in the states.  I'm not sure if that's related, but useful to know when all else fails.

http://www.nixiepixel.com/youtube-proxy/

The only success I have with proxies is to install every browser available.  And when I need to use a proxy, I give each of the browsers a try.  One of them generally works.  Proxies are a bit hit and miss anyway so you have to try a good half dozen before you find a combo that kind of works.  Gratuitous latency and all that jazz.  There's a few that you can run on your local network as well.  So far IceWeasel is the only one that works reliably (loosely interpreted) for me.  Epiphany, and Konqueror, not so much.  And you can generally do that translate via google trick to view a site you otherwise don't have access to.  From english to english.

But it's not the only cause of issues.  I've had sites behave poorly because of MTU settings (even though every other site on the planet works just fine).  And other DNS / routing issues where your DNS doesn't resolve the local variant and the non-local one doesn't want to play.  Plus with IPv6 stuff being more common these days it can get weird fast.