Copy OutputEnhancements.xnt from the XTensions folder of QuarkCopyDesk 8 and paste it into the XTensions folder of the QuarkXPress 8 folder. Then re-launch QuarkXPress 8.

Background: The purpose of the QPS Placeholder XT is to enable users to have access to QPS related header fields and other information when configuring output profiles. Removing it will not affect your QPS workflow, but you can resolve this problem by copying the Output Enhancements XT from the QuarkCopyDesk 8 XTensions folder into the QuarkXPress 8 XTensions folder.