Is this still an issue? Does the poll.log show any data collection for your reference set? If you can update this we might be able to advise further, but as this is an older post, update and let us know if this feed is working.
our article on reviewing logs for application error might be of help to you
https://www.ibm.com/support/pages/qradar-review-logs-applications-errors
#QRadar#Support#SupportMigration