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I suspect Build 2868 (similar to 2872 noted here http://www.obitalk.com/forum/index.php?topic=8984.0 (http://www.obitalk.com/forum/index.php?topic=8984.0)) uses GV OAuth and requires using OBiTALK.com to provision GV on your OBi.
You can not use the local OBi web interface to configure GV. You must use OBiTALK.com. Some clues are posted here http://www.obitalk.com/forum/index.php?topic=9980.msg65961#msg65961 (http://www.obitalk.com/forum/index.php?topic=9980.msg65961#msg65961).
OE