Unable to upload file in plone

HI All,

We have successfully integrated plone with postgres combinations as below but we are unable to upload file getting below error

platform: ubuntu 14.04
plone: 5.0.8
postgres : 9.3

Module ZPublisher.Publish, line 146, in publish
Module Zope2.App.startup, line 303, in commit
Module transaction._manager, line 89, in commit
Module transaction._transaction, line 329, in commit
Module transaction._transaction, line 443, in _commitResources
Module ZODB.Connection, line 567, in commit
Module ZODB.Connection, line 623, in _commit
Module ZODB.Connection, line 675, in _store_objects
Module relstorage.storage, line 1302, in storeBlob

AttributeError: 'NoneType' object has no attribute 'storeBlob'

working fine missing below parameter in buildout.cfg
blob-dir /opt/blob

Please file a bug report...the error behavior of Relstorage is not helpful here...it should really perform checks on required parameters like the blob directory. A reasonable error message would be here either "blob-dir not configured" or "Unable to open blob file /path/to/blob file"...