All of the other forums I read work, so the problem is with Anandtech forums.
Same issue here.
Here was the reply we got when we pointed this thread out to the Purch folks:
"Tapatalk remains installed, and hasn't moved. This could be due to a shift in license update from XenForo 2 to XenForo 2.1.3. Maybe the Tapatalk add-on is still thinking it's the older version. I'll ask on this over the weekend, since it should be an easy fix for a dev if one is around."
Here's hoping for that 'easy fix.'
This.Fixed today! Thank you.