Quota feature is to move out of TechPreview and be supported in 3.3 (without having a REST API for quota definitions).
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.