"Unable to activate" error received when trying to supervise iPads
I am receiving an "Unable to activate" error when trying to supervise iPads. I've already done 500+ using the same method, so it's weird that it's happening now.
The full error is "Unable to activate. The device failed to activate with a valid activation record."
Error details:
Description: Unknown (AMDevice Error = 2)
Code: 2
Domain: com.apple.mdk.amderror
Any help to get this up and running again would be great. Thanks in advance!
Apple Configurator Version 1.3 (264)
iPad 2
Mac Mini (Mid 2011)
Configurator-OTHER, OS X Mountain Lion (10.8.4)