In DPS 2015, every article has a unique article name. Migrated article content adjusts the navto links to use the new article names, but it's likely that the Edge Animate-built navto was not updated in the migration process.
The likely solution is to examine the article name in the DPS Portal, then rebuild the navto link in Edge Animate and incorporate it into your InDesign file.
While you're in the ID file, update the navto links there too, then export to an article file.
Upload this new article file to replace the Content for the article in the DPS Portal.