"The asset(s) could not be retrieved from the MediaBin server." ?

System

When trying to watermark any asset (pdf/image) etc - please advise, thanks!

Requirement: enable end users to download assets as-is, just add a watermark!

BLP0022339.tif: Exception in Primitive {D202C193}! Reason = Unspecified error, Message = Digimarc failed to watermark.

060531_scoop_lohan_vmed_1p.widec.jpg: Exception in Primitive {D202C193}! Reason = Unspecified error, Message = Digimarc failed to watermark.

13302counselorsguidefull.pdf: Exception in Primitive {D202C193}! Reason = Unspecified error, Message = Digimarc failed to watermark.