When I encountered this issue it was only impacting specific users. I found out that the affected users were missing a permission in CUIC. Login to Unified Intelligence Center or the UCCX server that houses your CUIC. Navigate to Configure -> Users -...
I've just started encountering this issue as well. We are not running a standalone CUIC server. We're using UCCX to host the reporting side of things. Has anyone found any other fixes for this?