i have the same problem too , this is how the story goes :
technician formatted the PC with Nor Groove ID(and lost the Digital Fingerprint), and now the PC is back to health and installed the groove.so when i try to create new Nor Groove ID it was successful but when i try to invite Nor Groove new ID into the Workspace. it give you "Unspecified Delivery Error".
however i have try to use GrooveClean.exe to wipe out all the data but is was not working.
and i also try to backup my workspace and manually transfer the file to Nor PC and start from Nor PC but wasnt sync with my PC and i guess it require to invite everyone again and start to download the file again.which i would not want to
please help
*The new Nor Groove ID using the same email address and even use a different email address still not working.