It's not just you. I have exactly the same problem. It began sometime yesterday, June 14.
The settings in the obi100 had not changed. I am having no other Internet problems.
I have restarted the obi100 and the modem. I have tried connecting the obi100 directly to the modem. I have set the DNS provider in the obi100 to 4.2.2.2, even though the "Backing off" message includes an IP address, indicating that DNS is working properly.
A friend of mine in the area is having no problem. He and I are both Time Warner Cable customers.