For what it is worth :
I had the same problem (error code) when trying to download cubaseai 7.
After trying many things, it appeared that I had two MySteinberg accounts (each with a different email address), and I tried to download from the account which has no elicenser registered. Passing to the other account solved the problem. Now, I would like to merge those two accounts, to avoid future problems. Is this possible ?
Stephane.