The message appears due to a bug with InDesign on PCs, and running InDesign as administrator should fix it.

If you're on a PC and try to export from InDesign with in5 but get a "Loading license and interfaces...," try the following:

  • Quit InDesign
  • Go to the Start menu and type InDesign in the Search
  • Right-click on InDesign in the menu
  • Select Run as administrator